FREEMEDSITE MRCS ACADEMY · ARTICLE 20 · EMERGENCY GENERAL SURGERY

Acute Abdomen and Emergency Surgical Conditions Made Easy for MRCS Part A

Learn how to assess acute abdominal pain safely, recognise conditions that need immediate surgery, choose imaging, and avoid common MRCS clinical traps. Follow 12 focused modules, track 52 topics, and practise 40 fully explained five-option clinical SBAs.

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52Saved objectives

40Original SBAs

MRCS Part A • Paper 2Acute abdomen & surgical decisionsFive-choice original SBAsSaved in your browser

Learn → apply → test. Read the modules, tick each topic once understood, answer one question at a time, check your answer and read the explanation. All progress is saved on this device without a login.

Who should read this?

MRCS Part A candidates and junior surgical doctors who want the first safe decision in acute abdominal presentations, not isolated lists of diagnoses. Every question is newly written for FreeMedSite and does not reproduce confidential examination material.

Clinical safety: Emergency surgery requires bedside assessment, timely senior involvement and local protocols. This material is educational; no vignette replaces the assessment of a real patient.

On this page

1. The first ten minutes: treat instability before imaging2. Pain patterns, examination and serious mimics3. Investigations and imaging: choose by clinical question4. Acute appendicitis: diagnosis, imaging and treatment choices5. Small-bowel obstruction: simple, closed-loop and strangulated6. Perforated viscus and generalised peritonitis7. Acute cholecystitis, choledocholithiasis and cholangitis8. Acute pancreatitis: recognition and avoiding harmful interventions9. Mesenteric ischaemia and vascular catastrophes10. Diverticulitis, large-bowel obstruction and volvulus11. Gastrointestinal haemorrhage: first stabilise, then localise12. Pregnancy, urinary, testicular and extra-abdominal mimics52-topic saved revision checklist40 clinical MRCS-style SBAsFrequently asked questionsReferences and related lessons

1. The first ten minutes: treat instability before imaging

An acute abdomen is a presentation, not a single diagnosis. Separate physiology (stable or unstable) from pathology (inflammation, obstruction, perforation, haemorrhage, ischaemia or extra-abdominal mimic). A focused ABCDE assessment, early observations, two appropriate IV access lines when seriously ill, analgesia, fluid/blood resuscitation as indicated, fasting and early surgical/specialty escalation are often more important than choosing the final diagnosis immediately.

Red flags include persistent hypotension, altered consciousness, rigid abdomen, guarding with systemic toxicity, an irreducible tender hernia, severe pain with little tenderness in a vascular-risk patient, active gastrointestinal bleeding and a positive pregnancy test with shock. Reassess after analgesia; appropriate pain relief does not invalidate the examination.

In suspected sepsis, follow the current local sepsis pathway while searching for a source needing source control. A lactate can help identify hypoperfusion but is not a stand-alone test for or against bowel ischaemia.

Clinical decision

A hypotensive patient with diffuse peritonitis needs resuscitation and urgent senior operative assessment concurrently; do not keep waiting for a routine CT slot.

Exam pearl

The earliest important decision is whether the patient needs immediate resuscitation or source control—not whether the pain is appendicitis or gastritis.

Original FreeMedSite decision pathway. Stability and suspicion determine timing of imaging.

2. Pain patterns, examination and serious mimics

Ask about site, onset, migration, character, vomiting, bowel habit, bleeding, urinary symptoms, menstrual/pregnancy history, previous surgery, medications and anticoagulants. Visceral pain is often poorly localised; progression to parietal peritoneal irritation produces sharper localised pain. Sudden maximal pain suggests perforation, vascular catastrophe or other acute emergencies.

Migratory periumbilical-to-right-iliac-fossa pain suggests appendicitis, but retrocaecal appendix, pregnancy, advanced age and early disease may give atypical findings. Right upper quadrant pain, fever and Murphy sign favour cholecystitis; epigastric pain radiating to the back raises pancreatitis and should also prompt consideration of cardiac ischaemia or vascular disease.

Examination: assess hydration, perfusion, full abdomen, all hernial orifices, rectum only when indicated, cardiopulmonary system and relevant testicular/pelvic findings. Pregnancy testing is essential in reproductive-age patients when relevant. Absence of fever or a normal white-cell count does not exclude a major surgical emergency.

Clinical decision

An elderly patient with major abdominal pathology may have little guarding; physiology and imaging often carry more weight than classic signs.

Exam pearl

Do not anchor on a normal inflammatory marker, painless interval, or a single negative sign.

3. Investigations and imaging: choose by clinical question

First-line tests are guided by severity and differential: CBC, CRP, renal function/electrolytes, liver tests, lipase, venous/arterial blood gas and lactate when indicated, coagulation, group-and-save/crossmatch in bleeding risk, urine tests and pregnancy test. Order ECG/troponin if cardiac symptoms or risk factors are present. Serial examinations matter more than one laboratory snapshot.

Ultrasound is useful for gallbladder disease, pelvic/early pregnancy conditions and many paediatric presentations. CT abdomen–pelvis with IV contrast is useful in many stable adults with unclear, complicated abdominal disease. In suspected acute mesenteric ischaemia, request a dedicated CT angiogram (CTA) without avoidable delay. Free intraperitoneal air supports perforation but may be absent early or after a contained leak.

CT is not a licence to delay treatment of shock or diffuse peritonitis. Use the appropriate modality for pregnancy and children, follow radiology protocols and involve senior decision-makers early when operative intervention is probable.

Clinical decision

Question in a stable older patient with distension and previous laparotomy: CT evaluates level, cause, closed-loop configuration, free fluid and threatened bowel.

Exam pearl

Normal early lactate does not rule out acute mesenteric ischaemia.

4. Acute appendicitis: diagnosis, imaging and treatment choices

Classically, visceral mid-abdominal pain localises to the right iliac fossa, with anorexia, nausea and focal tenderness. Guarding suggests local peritoneal irritation, while perforation may progress to generalised peritonitis. Pregnancy, children and older adults may have atypical symptoms. Clinical risk tools help stratify rather than replace judgement.

Imaging pathway depends on age, sex, pregnancy status and local expertise. Ultrasound can be first-line when appropriate; CT is often valuable for uncertain adult cases and complications. Laparoscopic appendicectomy remains a standard definitive treatment. Carefully selected uncomplicated appendicitis may be managed initially with antibiotics after counselling about failure or recurrence; this is not equivalent to treating perforation with diffuse peritonitis conservatively.

An appendiceal abscess/phlegmon in a stable patient may be managed non-operatively with antibiotics and drainage when feasible, under specialist supervision. The management choice is based on clinical stability, source control and available expertise.

Clinical decision

An apparently uncomplicated case may be discussed as an antibiotics-first option; diffuse generalised peritonitis demands urgent surgical source control.

Exam pearl

Do not call appendicitis excluded because the appendix is retrocaecal or not visualised on ultrasound.

5. Small-bowel obstruction: simple, closed-loop and strangulated

Adhesions are a common cause of adult small-bowel obstruction, particularly after abdominal surgery. Typical symptoms are colicky pain, vomiting, distension and reduced passage of flatus/stool. Examine all groin hernias and look for previous scars. Distal obstruction tends to produce more distension, while proximal obstruction may cause earlier vomiting.

CT helps determine the transition point, cause and complications. Closed-loop obstruction, absent or reduced mural enhancement, free fluid, pneumatosis and peritonitis raise concern for ischaemia or strangulation. Stable uncomplicated adhesive obstruction may be treated initially with IV fluid/electrolyte correction, nasogastric decompression when appropriate, fasting and careful monitoring under the surgical team.

Constant severe pain, fever, tachycardia, localised tenderness or rising lactate may indicate threatened bowel but none alone is perfectly sensitive. Operative intervention should not be delayed when there is peritonitis, strangulation or bowel ischaemia.

Clinical decision

Stable adhesional obstruction is not the same as a closed-loop obstruction with reduced bowel-wall enhancement.

Exam pearl

A patient may still pass stool early in mechanical small-bowel obstruction.

Original FreeMedSite schematic. A closed-loop or threatened bowel is not a routine conservative obstruction.

6. Perforated viscus and generalised peritonitis

Sudden severe epigastric pain followed by a rigid abdomen suggests perforated peptic ulcer, but other causes include perforated diverticulitis, appendicitis and bowel ischaemia. Upright radiography may reveal free subdiaphragmatic gas, but a normal plain film does not exclude perforation. CT is useful in stable patients to localise a leak.

Initial care includes resuscitation, nil by mouth, IV broad-spectrum antibiotics according to local intra-abdominal infection policy, electrolyte correction, senior surgical assessment and timely operative or percutaneous source control when indicated. In perforated peptic ulcer, surgical repair plus appropriate ulcer management is a common pathway.

Perforation and contamination are not the same as postoperative free air; interpret imaging in its clinical context. Delay to definitive control in a deteriorating septic patient worsens outcomes.

Clinical decision

Board-like rigidity, shock and free intraperitoneal gas imply a surgical emergency—not outpatient antacid therapy.

Exam pearl

Do not choose CT first when a profoundly unstable patient needs immediate resuscitation and source control.

7. Acute cholecystitis, choledocholithiasis and cholangitis

Biliary colic is typically episodic pain without sustained inflammatory signs. Acute cholecystitis causes prolonged right upper quadrant pain, fever and gallbladder tenderness; ultrasound may show wall thickening, stones and pericholecystic fluid. NICE recommends early laparoscopic cholecystectomy—within one week of diagnosis—where clinically suitable.

Choledocholithiasis may cause jaundice or obstructed liver biochemistry. Acute cholangitis is infection of an obstructed biliary tree: fever, right upper quadrant pain and jaundice are the classical triad, but not all patients exhibit all three features. Hypotension or confusion signals potential severe disease.

Severe cholangitis requires immediate resuscitation, antibiotics and timely biliary drainage, usually by ERCP, arranged urgently according to severity. Cholecystectomy alone does not rapidly relieve an infected obstructed common bile duct.

Clinical decision

Septic patient with gallstones, jaundice and dilated CBD: focus on sepsis and urgent drainage, not elective cholecystectomy first.

Exam pearl

A normal bilirubin does not always exclude early cholecystitis; an abnormal bilirubin alone does not prove cholangitis.

Original FreeMedSite comparison. Sepsis from obstructed CBD needs biliary drainage rather than isolated gallbladder surgery.

8. Acute pancreatitis: recognition and avoiding harmful interventions

Acute pancreatitis usually presents with severe epigastric pain often radiating to the back, with nausea and vomiting. Diagnosis commonly uses two of: characteristic pain, pancreatic enzymes more than three times the upper limit of normal, or compatible imaging. A lipase result should be interpreted with the overall clinical picture.

Initial management is supportive: appropriate IV fluid guided by haemodynamics, analgesia, monitoring for organ dysfunction and nutrition as tolerated. Routine prophylactic antibiotics are not indicated in sterile pancreatic necrosis. ERCP is not routine for every case of gallstone pancreatitis; it is considered when there is cholangitis or persistent biliary obstruction.

Contrast CT can be useful when diagnosis is uncertain, the patient deteriorates or complications are suspected; routine early CT in obvious mild pancreatitis may not add value. Complications include systemic inflammatory response, organ failure, collections, necrosis and pseudocysts.

Clinical decision

Gallstone pancreatitis plus cholangitis is a different emergency from uncomplicated gallstone pancreatitis.

Exam pearl

Raised lipase alone does not prove severe pancreatitis or indicate immediate laparotomy.

9. Mesenteric ischaemia and vascular catastrophes

The hallmark early history of acute mesenteric ischaemia may be sudden, severe abdominal pain out of proportion to examination, particularly in atrial fibrillation or other embolic disease. As infarction develops, peritonitis and haemodynamic instability may appear. A normal early lactate cannot reliably exclude ischaemia.

CTA is the key urgent test when mesenteric ischaemia is suspected. Prompt resuscitation, broad-spectrum antibiotics when bowel ischaemia is suspected, anticoagulation in appropriately selected patients and urgent vascular/general surgical intervention are essential. Peritoneal signs suggest necrosis and need urgent operative assessment; bowel viability and revascularisation are specialist decisions.

A ruptured abdominal aortic aneurysm may present with abdominal or back pain and shock, occasionally without a clearly palpable pulsatile mass. Haemodynamic instability requires immediate vascular/emergency team activation rather than delayed routine outpatient imaging.

Clinical decision

Pain out of proportion in an atrial fibrillation patient warrants urgent CTA and senior review even if lactate is initially normal.

Exam pearl

Do not confuse chronic postprandial mesenteric angina with sudden embolic ischaemia.

10. Diverticulitis, large-bowel obstruction and volvulus

Left iliac fossa pain with fever may represent sigmoid diverticulitis; CT can identify perforation, abscess or alternative pathology. Stable uncomplicated disease is managed selectively according to comorbidity and severity; antibiotics are not mandatory for every immunocompetent uncomplicated case under all modern guidelines. An abscess may need image-guided drainage; diffuse peritonitis demands urgent source control.

Large-bowel obstruction from cancer, volvulus or stricture commonly causes substantial distension and obstipation. A sigmoid volvulus without suspected ischaemia or perforation is generally first treated with urgent flexible endoscopic decompression, followed by a plan for definitive prevention of recurrence. With peritonitis, necrosis or perforation, emergency surgery is required.

Caecal volvulus generally requires operative management rather than routine endoscopic detorsion. Distinguish ileus/pseudo-obstruction from mechanical obstruction by symptoms, context and imaging.

Clinical decision

Stable sigmoid volvulus without peritonitis → urgent endoscopic decompression; peritonitis → operative management.

Exam pearl

Do not assume the sigmoid volvulus pathway applies to caecal volvulus.

11. Gastrointestinal haemorrhage: first stabilise, then localise

Haematemesis and melaena suggest upper gastrointestinal bleeding; brisk upper bleeding can sometimes present as haematochezia. Initial priorities are airway protection when needed, haemodynamic assessment, venous access, blood testing, blood products guided by status and protocol, and early gastroenterology/surgical input.

After resuscitation, upper endoscopy is commonly performed within 24 hours for admitted nonvariceal upper GI bleeding, with greater urgency when indicated by ongoing severe bleeding. A restrictive transfusion approach often uses haemoglobin around 7 g/dL in haemodynamically stable patients, but thresholds are modified for shock, myocardial ischaemia and comorbidity.

Suspected variceal haemorrhage follows a separate high-risk pathway, often including vasoactive treatment, antibiotics and urgent therapeutic endoscopy under a specialist team. In lower bleeding, stable versus unstable physiology determines the sequence of imaging and endoscopic/interventional procedures.

Clinical decision

A hypotensive patient with major haematemesis needs resuscitation before diagnostic endoscopy; two large IVs do not substitute for source control.

Exam pearl

Bright red rectal blood can originate from a brisk upper GI source in massive bleeding.

12. Pregnancy, urinary, testicular and extra-abdominal mimics

Always consider a pregnancy-related emergency in relevant reproductive-age patients. Ruptured ectopic pregnancy may cause abdominal pain, syncope, vaginal bleeding, shoulder-tip pain and shock. A positive pregnancy test with instability requires urgent gynaecological escalation and resuscitation; do not wait for a discriminatory serum hCG before acting on suspected rupture.

Renal colic causes severe flank pain radiating to groin and may mimic appendicitis, but fever with obstruction raises concern for an infected obstructed kidney requiring urgent antibiotics and urinary drainage. Testicular torsion can present as lower abdominal pain; inspect the scrotum promptly when relevant, as ultrasound should not delay urgent surgical exploration with high suspicion.

Also consider myocardial infarction, lower-lobe pneumonia, diabetic ketoacidosis, sickle crises and acute porphyria. Discharge only with a plausible low-risk diagnosis, adequate symptom control, appropriate follow-up and explicit safety-net instructions.

Clinical decision

A young patient with acute iliac-fossa pain and no scrotal examination is an incomplete emergency assessment.

Exam pearl

Common mimics become dangerous when the examination is restricted to the abdomen only.

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First response

ABCDE assessment and vital red flagsSigns requiring emergency senior reviewEarly analgesia and fastingSepsis recognition and source control

History and examination

Pain location and migrationPeritoneal signs and guardingAll hernial orificesRelevant pregnancy and gynaecological historyTesticular/urinary and extra-abdominal mimics

Testing and imaging

Appropriate blood tests and lactate caveatPregnancy testing when relevantUS for biliary or pelvic indicationsContrast CT in stable uncertain casesCTA for suspected mesenteric ischaemia

Appendix

Appendicitis clinical progressionUltrasound and CT rolesUncomplicated appendicitis management optionsPerforated appendicitis and source control

Small-bowel obstruction

Adhesions and hernia causesVomiting/distension and transition pointSimple vs closed-loop obstructionStrangulation and threatened bowelNG decompression and fluid correction

Perforation and peritonitis

Sudden pain and free airPerforated ulcer recognitionEmergency operative source controlAntibiotics and fluid resuscitation

Biliary emergencies

Biliary colic vs cholecystitisGallbladder US findingsAcute cholangitis recognitionUrgent biliary drainage and ERCP

Pancreatitis

Diagnostic two-of-three criteriaGallstone pancreatitis without cholangitisWhen urgent ERCP is indicatedSterile necrosis and antibiotic myth

Vascular abdomen

Acute mesenteric ischaemia warning patternCTA and urgent revascularisation pathwayLactate limitationsRuptured AAA as a mimic

Large bowel

Diverticulitis and abscessLarge bowel obstruction assessmentSigmoid volvulus with viable bowelVolvulus with peritonitisCaecal volvulus operative pathway

GI bleeding

Shock and airway protectionTiming of endoscopy after resuscitationUpper vs lower sourceVariceal bleeding pathways

Dangerous mimics

Ectopic pregnancy with shockTesticular torsion and examinationObstructed infected renal systemDischarge safety-net and reassessment

40 original MRCS emergency-surgery SBAs

Five options, one best answer. Predominantly clinical decision vignettes and original writing; neither copied recall papers nor official exam questions.

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Question 1 of 40

Question 1 of 40 · Unstable acute abdomen

Q01. A 68-year-old man develops abrupt severe abdominal pain, a rigid abdomen and systolic BP 78 mmHg. The team asks whether to send him for a routine CT before surgical review. What is the most appropriate immediate plan?

A. Simultaneous resuscitation, broad-spectrum treatment as indicated and urgent senior operative assessmentB. Discharge with oral antacidsC. Wait for serum CRP before actionD. Send immediately to an outpatient ultrasound clinicE. Repeat examination only after six hours

View detailed explanation, examiner trap and viva

Correct answer: A. Simultaneous resuscitation, broad-spectrum treatment as indicated and urgent senior operative assessment

Why correct: Shock with diffuse peritonitis signals a source-control emergency. Resuscitation and escalation begin at once; investigations must not create preventable delay.

Why the other options are incorrect:

B. Discharge with oral antacids: A rigid abdomen and shock are not a benign dyspepsia presentation.

C. Wait for serum CRP before action: Inflammatory markers can be normal early and do not supersede instability.

D. Send immediately to an outpatient ultrasound clinic: Outpatient investigation cannot manage haemodynamic instability.

E. Repeat examination only after six hours: Observation without active resuscitation or surgical escalation is unsafe in this situation.

Exam pearl: Resuscitation and diagnostic reasoning occur together in a critically ill patient.

Examiner trap: Do not equate “CT is useful” with “CT is always first.”

Viva extension: When does surgery precede imaging? When immediate source control is required and imaging would delay life-saving intervention.

Question 2 of 40 · Pregnancy test in RIF pain

Q02. A 26-year-old woman reports right iliac-fossa pain, nausea and light vaginal spotting. She is haemodynamically stable. Before CT for suspected appendicitis, which basic investigation is particularly important?

A. Serum rheumatoid factorB. Pregnancy test with appropriate pelvic evaluationC. Faecal occult blood testD. Routine tumour marker CA-125E. Serum uric acid

View detailed explanation, examiner trap and viva

Correct answer: B. Pregnancy test with appropriate pelvic evaluation

Why correct: Ectopic pregnancy can mimic appendicitis and changes both urgency and imaging strategy. Reproductive-age status alone does not exclude pregnancy.

Why the other options are incorrect:

A. Serum rheumatoid factor: It does not address a life-threatening differential for acute pelvic pain.

C. Faecal occult blood test: Occult gastrointestinal bleeding is not the immediate differential prioritised here.

D. Routine tumour marker CA-125: CA-125 does not replace pregnancy assessment or urgent pelvic examination.

E. Serum uric acid: Uric acid neither establishes appendicitis nor excludes ectopic pregnancy.

Exam pearl: Consider ectopic pregnancy in every potentially pregnant patient with acute lower abdominal pain.

Examiner trap: A report of contraception or irregular periods does not reliably exclude pregnancy.

Viva extension: What is the preferred first pelvic imaging when pregnancy is suspected? Transvaginal ultrasound under an appropriate pathway.

Question 3 of 40 · Typical appendicitis

Q03. A previously well 21-year-old has anorexia, nausea and pain that began near the umbilicus and moved to the right iliac fossa. He is mildly febrile with focal tenderness. What is the most likely diagnosis?

A. Acute pancreatitisB. Acute cholecystitisC. Acute appendicitisD. Sigmoid diverticulitisE. Mesenteric ischaemia due to embolus

View detailed explanation, examiner trap and viva

Correct answer: C. Acute appendicitis

Why correct: Migration from visceral periumbilical pain to localised parietal right-iliac-fossa pain is a classic pattern, though not universally present.

Why the other options are incorrect:

A. Acute pancreatitis: Pancreatitis typically causes epigastric pain, commonly radiating to the back.

B. Acute cholecystitis: Cholecystitis usually localises to the right upper quadrant rather than migratory RIF pain.

D. Sigmoid diverticulitis: Classic sigmoid diverticulitis generally causes left lower-quadrant pain.

E. Mesenteric ischaemia due to embolus: This tends to cause sudden severe pain with vascular risks, often initially disproportionate to examination.

Exam pearl: Pain migration is high yield, but its absence does not exclude appendicitis.

Examiner trap: Retrocaecal appendicitis may cause flank/back symptoms and limited anterior tenderness.

Viva extension: What anatomical process localises appendicitis pain? Irritation of the parietal peritoneum near the inflamed appendix.

Question 4 of 40 · Appendicitis with diffuse peritonitis

Q04. A 34-year-old has 48 hours of right iliac-fossa pain followed by fever, tachycardia, increasing generalised guarding and CT evidence of perforated appendicitis with diffuse contamination. What is the best overall management principle?

A. Send home with oral antibiotics and no planned follow-upB. Observe until the pain settles spontaneouslyC. Treat as functional abdominal painD. Resuscitation, antimicrobial treatment and urgent operative source controlE. Arrange routine elective appendicectomy several months later

View detailed explanation, examiner trap and viva

Correct answer: D. Resuscitation, antimicrobial treatment and urgent operative source control

Why correct: Generalised peritonitis from perforation is not the low-risk uncomplicated appendicitis population considered for antibiotic-first care.

Why the other options are incorrect:

A. Send home with oral antibiotics and no planned follow-up: Diffuse peritonitis needs urgent hospital-based source control.

B. Observe until the pain settles spontaneously: Clinical deterioration and contamination make passive observation unsafe.

C. Treat as functional abdominal pain: The CT and peritoneal findings establish organic surgical disease.

E. Arrange routine elective appendicectomy several months later: Interval strategies relate to selected controlled collections, not uncontrolled diffuse peritonitis.

Exam pearl: Perforation plus diffuse peritonitis changes the urgency of appendiceal disease.

Examiner trap: Do not use “antibiotics can treat some appendicitis” to justify non-operative treatment of generalised sepsis.

Viva extension: What are the goals of source control? Stop contamination, remove/drain infected focus and restore viable anatomy as indicated.

Question 5 of 40 · Appendiceal abscess stable

Q05. A 45-year-old with several days of right iliac-fossa pain has a well-defined appendiceal abscess on CT. He is afebrile after resuscitation, stable and has no diffuse peritonitis. What is a reasonable specialist initial option?

A. Discharge without any treatmentB. Automatic full colectomyC. Delay all review until an interval clinic months laterD. ERCP for drainageE. Antibiotics with consideration of image-guided drainage according to collection accessibility

View detailed explanation, examiner trap and viva

Correct answer: E. Antibiotics with consideration of image-guided drainage according to collection accessibility

Why correct: A contained abscess in a stable patient can often be treated initially without immediate appendicectomy, with close observation and clear criteria for escalation.

Why the other options are incorrect:

A. Discharge without any treatment: A confirmed abdominal abscess requires clinical management and monitoring.

B. Automatic full colectomy: There is no indication for major colonic resection solely from a contained appendiceal collection.

C. Delay all review until an interval clinic months later: The collection needs current care, reassessment and decisions about drainage.

D. ERCP for drainage: The abscess is appendiceal, not an obstructed biliary duct.

Exam pearl: Abscess management hinges on physiological stability and adequate drainage/source control.

Examiner trap: Not all perforated appendicitis presentations have identical management.

Viva extension: When is immediate surgery more likely? Diffuse peritonitis, failure of non-operative treatment or instability.

Question 6 of 40 · Adhesive small-bowel obstruction

Q06. A 63-year-old with a previous midline laparotomy has colicky pain, bilious vomiting and abdominal distension. CT shows adhesional small-bowel obstruction without closed loop, perforation, ischaemia or peritoneal signs. He remains stable. What is an appropriate initial strategy?

A. Monitored non-operative management with fasting, IV fluids and decompression when indicatedB. Immediate ERCPC. Routine bowel preparation and colonoscopyD. High-fibre oral diet immediatelyE. Elective outpatient review without observation

View detailed explanation, examiner trap and viva

Correct answer: A. Monitored non-operative management with fasting, IV fluids and decompression when indicated

Why correct: Stable uncomplicated adhesive obstruction may resolve without emergency surgery; it requires serial evaluation for threatened bowel.

Why the other options are incorrect:

B. Immediate ERCP: A mechanical small bowel transition point is not biliary obstruction.

C. Routine bowel preparation and colonoscopy: Colonoscopy is not the first intervention for adhesive small bowel obstruction and may introduce risk.

D. High-fibre oral diet immediately: The obstructed bowel should not be loaded with food during an acute episode.

E. Elective outpatient review without observation: Acute obstruction needs monitored inpatient surgical assessment, fluids and reassessment.

Exam pearl: Stable uncomplicated adhesive obstruction may be treated conservatively, but not without vigilance.

Examiner trap: Passing a small stool early does not exclude obstruction.

Viva extension: What changes the plan? Peritonitis, closed-loop signs, ischaemia or clinical deterioration.

Question 7 of 40 · Strangulation on CT

Q07. A patient with vomiting and severe persistent abdominal pain has CT evidence of small-bowel obstruction with a C-shaped closed loop, mesenteric oedema, free fluid and reduced bowel-wall enhancement. What should be prioritised?

A. A prolonged home trial of laxativesB. Urgent operative assessment for bowel strangulation and source controlC. Oral contrast and discharge if it reaches the colonD. Routine colonoscopy for decompressionE. Wait for a very high lactate before consulting surgery

View detailed explanation, examiner trap and viva

Correct answer: B. Urgent operative assessment for bowel strangulation and source control

Why correct: Closed-loop morphology with reduced enhancement suggests threatened bowel and cannot be managed as a routine uncomplicated adhesional obstruction.

Why the other options are incorrect:

A. A prolonged home trial of laxatives: A threatened closed loop can progress to infarction; home care is unsafe.

C. Oral contrast and discharge if it reaches the colon: The concerning ischaemia signs already require urgent action.

D. Routine colonoscopy for decompression: Colonoscopy is not indicated for strangulated small bowel.

E. Wait for a very high lactate before consulting surgery: Lactate may remain normal early and must not delay management.

Exam pearl: CT bowel-wall enhancement and closed-loop configuration are critical findings.

Examiner trap: Do not wait for pneumatosis or established perforation as the threshold for concern.

Viva extension: Why is a closed loop dangerous? Obstruction at two points may compromise mesenteric venous then arterial flow.

Question 8 of 40 · Strangulated femoral hernia

Q08. An 82-year-old woman presents with vomiting, abdominal distension and a painful irreducible groin lump below the inguinal ligament. The overlying skin is erythematous and she is tachycardic. What is the best action?

A. Forcefully reduce the mass and send her homeB. Prescribe topical antibiotics onlyC. Urgent surgical evaluation and operation after immediate resuscitationD. Arrange elective outpatient hernia repairE. Give high-dose oral laxatives

View detailed explanation, examiner trap and viva

Correct answer: C. Urgent surgical evaluation and operation after immediate resuscitation

Why correct: A tender irreducible femoral hernia with obstructive and inflammatory features raises concern for strangulation and requires emergency surgical management.

Why the other options are incorrect:

A. Forcefully reduce the mass and send her home: Taxis is inappropriate when strangulation is suspected; reduction en masse is also a risk.

B. Prescribe topical antibiotics only: Topical treatment does not relieve obstructed/strangulated bowel.

D. Arrange elective outpatient hernia repair: Potentially ischaemic trapped bowel cannot wait for an elective slot.

E. Give high-dose oral laxatives: Mechanical obstruction with a trapped loop is not treated with cathartics.

Exam pearl: Femoral hernias have a relatively high risk of strangulation.

Examiner trap: Not all groin lumps with a cough impulse are safe to reduce.

Viva extension: What lies immediately lateral to the femoral canal? The femoral vein.

Question 9 of 40 · Paralytic ileus versus mechanical obstruction

Q09. On day 2 after major laparotomy, a stable patient has diffuse abdominal distension and absent bowel sounds. Imaging shows widespread gas in both small and large bowel with no clear transition point. Which diagnosis best fits?

A. Strangulated femoral herniaB. Acute sigmoid volvulusC. Obstructing caecal carcinomaD. Postoperative ileusE. Perforated appendix with generalised sepsis

View detailed explanation, examiner trap and viva

Correct answer: D. Postoperative ileus

Why correct: Early postoperative ileus can cause diffuse impaired bowel motility without a mechanical transition point. Clinical reassessment is needed if symptoms persist or worsen.

Why the other options are incorrect:

A. Strangulated femoral hernia: No groin defect, transition point or strangulation signs are described.

B. Acute sigmoid volvulus: Typically causes a distinct large-bowel obstruction with an imaging configuration and transition.

C. Obstructing caecal carcinoma: Would usually produce a mechanical large-bowel obstruction rather than diffuse functional dilation.

E. Perforated appendix with generalised sepsis: Systemic deterioration and peritonitis would be more concerning than the stable early postoperative pattern shown.

Exam pearl: Ileus is functional paralysis; mechanical obstruction has a transition point.

Examiner trap: A prolonged or worsening “ileus” warrants evaluation for sepsis, leak, medications and mechanical obstruction.

Viva extension: What drugs contribute to ileus? Opioids and anticholinergic drugs, among others.

Question 10 of 40 · Perforated peptic ulcer

Q10. A 55-year-old has sudden severe epigastric pain followed by generalised rigidity. Upright chest radiograph shows free subdiaphragmatic air. He is tachycardic. What diagnosis is most likely?

A. Uncomplicated reflux oesophagitisB. Functional dyspepsiaC. Chronic uncomplicated cholelithiasisD. Uncomplicated IBSE. Perforated peptic ulcer causing pneumoperitoneum

View detailed explanation, examiner trap and viva

Correct answer: E. Perforated peptic ulcer causing pneumoperitoneum

Why correct: Abrupt epigastric pain, guarding and free intraperitoneal air support gastroduodenal perforation, requiring urgent resuscitation and surgical review.

Why the other options are incorrect:

A. Uncomplicated reflux oesophagitis: Reflux does not cause a rigid abdomen with free peritoneal gas.

B. Functional dyspepsia: A functional complaint cannot explain radiological pneumoperitoneum and peritonitis.

C. Chronic uncomplicated cholelithiasis: Gallstones do not typically cause free gas beneath the diaphragm.

D. Uncomplicated IBS: IBS does not produce peritoneal signs or pneumoperitoneum.

Exam pearl: Free air plus peritonitis is a perforated viscus until proven otherwise.

Examiner trap: A normal plain film does not exclude perforation; clinical context determines escalation.

Viva extension: Name three causes of pneumoperitoneum: perforated ulcer, perforated diverticulitis and postoperative free air.

Question 11 of 40 · Free air but stable imaging

Q11. A haemodynamically stable 41-year-old has sudden abdominal pain and localised guarding. A plain erect chest film shows no free air, but perforation remains strongly suspected. Which investigation is most useful to investigate a contained leak?

A. Contrast-enhanced CT of the abdomen and pelvisB. Repeat only the same upright chest film every hourC. A single normal CRP to exclude perforationD. Elective barium enemaE. Routine outpatient MRI in four weeks

View detailed explanation, examiner trap and viva

Correct answer: A. Contrast-enhanced CT of the abdomen and pelvis

Why correct: CT is more sensitive than plain radiography for pneumoperitoneum and helps localise complicated intra-abdominal pathology in a stable patient.

Why the other options are incorrect:

B. Repeat only the same upright chest film every hour: Serial plain films are less informative than CT for an equivocal suspected perforation.

C. A single normal CRP to exclude perforation: Early inflammatory markers are not sufficiently sensitive to rule out a leak.

D. Elective barium enema: It is not the appropriate first study for suspected acute perforation.

E. Routine outpatient MRI in four weeks: A suspected acute perforation requires prompt diagnosis and treatment.

Exam pearl: Negative subdiaphragmatic air on X-ray does not rule out perforation.

Examiner trap: Do not confuse “CT is best in stable uncertain cases” with delaying emergency surgery in shock.

Viva extension: What features favour early laparotomy? Widespread peritonitis, shock or worsening sepsis with strong source-control indication.

Question 12 of 40 · Uncomplicated acute cholecystitis

Q12. A 43-year-old woman has 24 hours of right upper quadrant pain, fever, positive Murphy sign and ultrasound showing gallstones, wall thickening and pericholecystic fluid. She is fit for surgery. What is the preferred definitive treatment strategy?

A. Elective cholecystectomy one year later in every caseB. Early laparoscopic cholecystectomy during the acute admissionC. ERCP alone as definitive managementD. Chronic proton-pump inhibitor without surgical reviewE. Total colectomy

View detailed explanation, examiner trap and viva

Correct answer: B. Early laparoscopic cholecystectomy during the acute admission

Why correct: NICE CG188 recommends early cholecystectomy, within one week of diagnosis in eligible patients. Initial analgesia and antibiotics follow clinical assessment.

Why the other options are incorrect:

A. Elective cholecystectomy one year later in every case: Routine delayed surgery risks recurrence and is not preferred in fit acute cholecystitis patients.

C. ERCP alone as definitive management: ERCP treats duct obstruction, not isolated inflamed gallbladder with cystic duct obstruction.

D. Chronic proton-pump inhibitor without surgical review: Acid suppression does not treat the inflamed stone-bearing gallbladder.

E. Total colectomy: There is no colonic indication in this presentation.

Exam pearl: Acute cholecystitis and cholangitis require different source-control procedures.

Examiner trap: The presence of gallstones does not automatically imply CBD stones.

Viva extension: What are the typical ultrasound signs? Stones, tenderness, wall thickening and pericholecystic fluid.

Question 13 of 40 · Acute cholangitis

Q13. A 71-year-old presents with fever, jaundice, right upper quadrant pain, confusion and hypotension. Ultrasound shows a dilated common bile duct with a distal stone. After immediate resuscitation and antibiotics, what is the key source-control intervention?

A. Immediate routine elective cholecystectomy as the only interventionB. Observe until jaundice completely disappearsC. Urgent biliary decompression, usually ERCPD. Prescribe only antacidsE. Wait for every blood culture result before drainage

View detailed explanation, examiner trap and viva

Correct answer: C. Urgent biliary decompression, usually ERCP

Why correct: The patient has severe acute cholangitis due to an infected obstructed CBD. Drainage is critical alongside sepsis treatment.

Why the other options are incorrect:

A. Immediate routine elective cholecystectomy as the only intervention: Gallbladder removal does not rapidly decompress the infected common bile duct.

B. Observe until jaundice completely disappears: Source obstruction with shock is unlikely to resolve safely without active drainage.

D. Prescribe only antacids: Acid suppression does not treat infected duct obstruction.

E. Wait for every blood culture result before drainage: Cultures should not delay urgent antibiotics and source control.

Exam pearl: Reynolds pentad adds hypotension and confusion to Charcot triad.

Examiner trap: Cholangitis can occur without the full classic triad; severity determines urgency.

Viva extension: What are the three elements of Charcot triad? Fever, right upper quadrant pain and jaundice.

Question 14 of 40 · Choledocholithiasis without sepsis

Q14. A 50-year-old with episodic upper abdominal pain has cholestatic liver tests, a dilated CBD and a visible duct stone. She is afebrile, stable and has no evidence of cholangitis. Which procedure can clear the duct obstruction?

A. AppendicectomyB. Chest-tube insertionC. ColectomyD. Therapeutic ERCP for CBD stone extraction when clinically indicatedE. Long-term antibiotics alone without duct assessment

View detailed explanation, examiner trap and viva

Correct answer: D. Therapeutic ERCP for CBD stone extraction when clinically indicated

Why correct: ERCP provides endoscopic duct clearance; subsequent cholecystectomy addresses the gallbladder source according to the care plan.

Why the other options are incorrect:

A. Appendicectomy: Appendix removal does not address duct stones.

B. Chest-tube insertion: There is no pleural process described.

C. Colectomy: No large-bowel pathology is involved.

E. Long-term antibiotics alone without duct assessment: Antibiotics do not reliably remove a persistent obstructing CBD stone.

Exam pearl: ERCP is primarily therapeutic when common duct clearance is required.

Examiner trap: Do not use ERCP for every uncomplicated biliary colic case without duct disease.

Viva extension: Which anatomical route does ERCP use? Duodenum to major papilla into the biliary tree.

Question 15 of 40 · Mild gallstone pancreatitis

Q15. A 39-year-old with sudden epigastric pain radiating to the back has lipase six times the upper limit of normal. Ultrasound demonstrates gallstones, but she has no jaundice, cholangitis or evidence of persistent obstruction. What is the best initial care?

A. Immediate ERCP for all gallstone pancreatitisB. Prophylactic antibiotics for every patientC. Immediate pancreatic necrosectomyD. Routine emergency total pancreatectomyE. Supportive management with analgesia, targeted IV fluids and monitoring

View detailed explanation, examiner trap and viva

Correct answer: E. Supportive management with analgesia, targeted IV fluids and monitoring

Why correct: This is acute pancreatitis; initial management is supportive. Routine urgent ERCP is not indicated without cholangitis or persistent biliary obstruction.

Why the other options are incorrect:

A. Immediate ERCP for all gallstone pancreatitis: An uncomplicated gallstone pancreatitis attack alone does not mandate urgent ERCP.

B. Prophylactic antibiotics for every patient: Sterile pancreatic inflammation is not an indication for automatic antibiotics.

C. Immediate pancreatic necrosectomy: There is no evidence of infected necrosis or other necrosectomy indication.

D. Routine emergency total pancreatectomy: Radical pancreatic resection is not treatment for uncomplicated acute pancreatitis.

Exam pearl: Biliary pancreatitis plus cholangitis is a special indication for urgent drainage.

Examiner trap: An enzyme level does not directly grade disease severity.

Viva extension: What are the common diagnostic criteria? Characteristic pain, elevated enzymes and supportive imaging; two of three usually suffice.

Question 16 of 40 · Sterile pancreatic necrosis

Q16. A patient with acute pancreatitis has CT-reported pancreatic necrosis but no gas in the collection, no sepsis, and no evidence of infection. Which statement about antibiotics is correct?

A. Routine prophylactic antibiotics are not recommended for sterile necrosisB. Give 6 weeks of antibiotics to every necrosis caseC. Start antifungal drugs routinelyD. Use vancomycin alone to prevent all pancreatic infectionE. Antibiotics replace organ-supportive care

View detailed explanation, examiner trap and viva

Correct answer: A. Routine prophylactic antibiotics are not recommended for sterile necrosis

Why correct: Sterile necrosis alone is not an infection. Antibiotics are reserved for documented/suspected infection or another clinical indication.

Why the other options are incorrect:

B. Give 6 weeks of antibiotics to every necrosis case: This exposes the patient to unnecessary resistance and adverse effects without treating proven infection.

C. Start antifungal drugs routinely: There is no routine indication for prophylactic antifungal treatment.

D. Use vancomycin alone to prevent all pancreatic infection: This does not cover the typical pathogens or evidence-based indication.

E. Antibiotics replace organ-supportive care: Organ-supportive care and nutrition remain critical to pancreatitis management.

Exam pearl: Necrosis does not mean infected necrosis.

Examiner trap: Gas may suggest infected necrosis but absence of gas alone does not guarantee sterility.

Viva extension: What prompts renewed infection assessment? Clinical sepsis, deterioration or culture evidence.

Question 17 of 40 · Acute mesenteric ischaemia — test

Q17. A 76-year-old with atrial fibrillation experiences abrupt extreme central abdominal pain, but examination shows only mild tenderness. Lactate is normal. What is the most useful urgent investigation?

A. Plain abdominal film onlyB. CT angiography of the abdominal mesenteric circulationC. Delayed outpatient colonoscopyD. A second lactate in 12 hours instead of imagingE. Abdominal ultrasound alone to rule it out

View detailed explanation, examiner trap and viva

Correct answer: B. CT angiography of the abdominal mesenteric circulation

Why correct: CTA is the diagnostic imaging test of choice for suspected acute mesenteric ischaemia; initial normal lactate does not exclude it.

Why the other options are incorrect:

A. Plain abdominal film only: Plain radiographs cannot reliably demonstrate arterial occlusion or threatened bowel.

C. Delayed outpatient colonoscopy: This does not rapidly assess mesenteric arterial occlusion and delays treatment.

D. A second lactate in 12 hours instead of imaging: Serial lactate may help monitoring but should not substitute for immediate vascular imaging.

E. Abdominal ultrasound alone to rule it out: Routine ultrasound is insufficiently sensitive in suspected acute mesenteric ischaemia.

Exam pearl: Pain out of proportion plus atrial fibrillation should trigger urgent CTA.

Examiner trap: Do not delay CTA solely because lactate has not risen.

Viva extension: What underlying process causes sudden embolic ischaemia? Arterial occlusion, frequently involving SMA territory.

Question 18 of 40 · Mesenteric ischaemia with peritonitis

Q18. A 79-year-old with atrial fibrillation has severe pain, metabolic acidosis and now diffuse peritonitis. CTA confirms proximal mesenteric arterial occlusion and non-enhancing bowel. What management principle takes priority?

A. Elective outpatient repeat CTA in one monthB. Observe on oral analgesia because pain may improveC. Urgent resuscitation and combined surgical/vascular intervention for revascularisation and nonviable bowelD. Give only antispasmodicsE. Routine diagnostic colonoscopy first

View detailed explanation, examiner trap and viva

Correct answer: C. Urgent resuscitation and combined surgical/vascular intervention for revascularisation and nonviable bowel

Why correct: Peritonitis and impaired bowel enhancement suggest infarction, requiring specialist operative and vascular source control, not observation.

Why the other options are incorrect:

A. Elective outpatient repeat CTA in one month: Delay risks fatal intestinal necrosis.

B. Observe on oral analgesia because pain may improve: Improvement from nerve injury in infarcting bowel is not reassuring.

D. Give only antispasmodics: These do not restore mesenteric perfusion or treat necrotic intestine.

E. Routine diagnostic colonoscopy first: Colonoscopy does not treat an occluded SMA and risks delaying intervention.

Exam pearl: Peritoneal signs in mesenteric ischaemia suggest advanced disease.

Examiner trap: Do not confuse anticoagulation as a substitute for urgent source control once necrosis is suspected.

Viva extension: Why is a second-look laparotomy sometimes used? To reassess borderline bowel viability after restoration of perfusion.

Question 19 of 40 · Ruptured AAA mimic

Q19. A 73-year-old smoker collapses with lower abdominal and back pain and profound hypotension. His abdomen is not rigid and no pulsatile mass is felt. What dangerous diagnosis must be urgently considered?

A. Uncomplicated constipationB. Chronic reflux diseaseC. Simple cystitisD. Ruptured abdominal aortic aneurysmE. Benign musculoskeletal pain alone

View detailed explanation, examiner trap and viva

Correct answer: D. Ruptured abdominal aortic aneurysm

Why correct: Ruptured AAA can cause shock and abdominal/back pain without a palpable mass or classic triad. Activate vascular/emergency haemorrhage response promptly.

Why the other options are incorrect:

A. Uncomplicated constipation: Constipation cannot explain sudden collapse with shock.

B. Chronic reflux disease: Reflux does not cause profound haemodynamic instability.

C. Simple cystitis: Lower urinary tract infection does not typically cause abrupt circulatory collapse and back pain.

E. Benign musculoskeletal pain alone: Musculoskeletal pain cannot account for severe unexplained hypotension.

Exam pearl: A palpable pulsatile mass is not required to suspect AAA rupture.

Examiner trap: Do not delay vascular escalation while trying to demonstrate all three classic signs.

Viva extension: What imaging may be used in unstable suspected AAA? Bedside ultrasound may rapidly identify aneurysm; definitive pathway follows vascular team advice.

Question 20 of 40 · Sigmoid volvulus without ischaemia

Q20. An 80-year-old nursing-home resident has progressive distension, constipation and a classic sigmoid volvulus pattern on CT. She is stable, without guarding, perforation or signs of ischaemia. What is the best initial decompression strategy?

A. Immediate routine total gastrectomyB. Home oral laxatives and observationC. Urgent ERCPD. Immediate ileal resection in every stable patientE. Urgent flexible endoscopic detorsion and decompression

View detailed explanation, examiner trap and viva

Correct answer: E. Urgent flexible endoscopic detorsion and decompression

Why correct: WSES recommends flexible endoscopic decompression as first-line in uncomplicated viable sigmoid volvulus, followed by planning definitive recurrence prevention.

Why the other options are incorrect:

A. Immediate routine total gastrectomy: The problem is colonic torsion, not gastric disease.

B. Home oral laxatives and observation: Volvulus is a mechanical large-bowel obstruction with recurrence/ischaemia risk.

C. Urgent ERCP: Biliary endoscopy does not treat sigmoid torsion.

D. Immediate ileal resection in every stable patient: The affected site is sigmoid and uncomplicated cases may be decompressed endoscopically.

Exam pearl: Sigmoid volvulus with viable bowel often gets endoscopic decompression first.

Examiner trap: Successful detorsion is not necessarily definitive: recurrence prevention needs a plan.

Viva extension: What changes management? Perforation, ischaemia, peritonitis or failed detorsion.

Question 21 of 40 · Volvulus with peritonitis

Q21. A 77-year-old has marked abdominal distension and sigmoid volvulus on imaging. He now has rebound tenderness, fever, rising lactate and free intraperitoneal gas. What is the correct priority?

A. Emergency operative management after rapid resuscitationB. Repeated sigmoidoscopic detorsion despite free airC. Watchful waiting with outpatient reviewD. Immediate high-fibre laxativesE. Routine barium enema reduction

View detailed explanation, examiner trap and viva

Correct answer: A. Emergency operative management after rapid resuscitation

Why correct: Perforation, sepsis and threatened bowel make endoscopic detorsion inappropriate; operative resection and source control are indicated.

Why the other options are incorrect:

B. Repeated sigmoidoscopic detorsion despite free air: Perforated or ischaemic colon requires surgical management, not repeated insufflation.

C. Watchful waiting with outpatient review: Peritonitis is a time-critical emergency.

D. Immediate high-fibre laxatives: These worsen the problem and do not address perforation.

E. Routine barium enema reduction: Contrast studies are inappropriate as a delay in perforated, septic volvulus.

Exam pearl: Perforation or peritonitis overrides the uncomplicated volvulus algorithm.

Examiner trap: Do not extrapolate stable sigmoid management to unstable patients.

Viva extension: Which factors influence anastomosis versus stoma? Physiology, contamination, perfusion and operative circumstances.

Question 22 of 40 · Caecal volvulus

Q22. A 34-year-old with acute obstruction has CT showing a displaced markedly dilated caecum with twisting of its mesentery. She has no diffuse peritonitis yet. Which definitive approach is most appropriate?

A. Routine flexible sigmoidoscopy as definitive therapyB. Urgent surgical management of caecal volvulusC. Oral fibre supplementsD. Conservative outpatient observation for several weeksE. ERCP with sphincterotomy

View detailed explanation, examiner trap and viva

Correct answer: B. Urgent surgical management of caecal volvulus

Why correct: Caecal volvulus usually requires an operation, unlike stable sigmoid volvulus where endoscopic decompression is often first-line.

Why the other options are incorrect:

A. Routine flexible sigmoidoscopy as definitive therapy: Endoscopic detorsion is less effective in caecal volvulus and increases delay/perforation risk.

C. Oral fibre supplements: Mechanical torsion is not relieved by dietary fibre.

D. Conservative outpatient observation for several weeks: Closed-loop colonic obstruction carries ischaemia risk.

E. ERCP with sphincterotomy: There is no common bile duct problem.

Exam pearl: Caecal and sigmoid volvulus have different first-line management pathways.

Examiner trap: An apparently stable patient can still develop caecal ischaemia rapidly.

Viva extension: What determines resection? Bowel viability, contamination and patient physiology.

Question 23 of 40 · Diverticulitis abscess

Q23. A 64-year-old with left iliac-fossa pain has CT-confirmed sigmoid diverticulitis with a well-circumscribed drainable abscess. She is stable without generalised peritonitis. What is an appropriate treatment component?

A. Routine immediate total pancreatectomyB. Send home without treatmentC. Antibiotics and consideration of percutaneous drainage according to size, access and clinical stateD. ERCP to drain the collectionE. High-dose laxatives alone

View detailed explanation, examiner trap and viva

Correct answer: C. Antibiotics and consideration of percutaneous drainage according to size, access and clinical state

Why correct: Stable complicated diverticulitis with a drainable abscess may be treated by antibiotics plus interventional radiology drainage when appropriate, with escalation if deterioration occurs.

Why the other options are incorrect:

A. Routine immediate total pancreatectomy: Pancreatic resection is unrelated to sigmoid diverticular abscess.

B. Send home without treatment: A radiologically confirmed complicated collection needs specialist management and reassessment.

D. ERCP to drain the collection: A pericolic abscess is not within the biliary system.

E. High-dose laxatives alone: Laxatives cannot control infected collection or complications.

Exam pearl: Diverticular abscess size, access and physiology guide drainage.

Examiner trap: “Diverticulitis” is not one uniform management group; distinguish uncomplicated from complicated.

Viva extension: When is urgent colectomy considered? Free perforation with generalised peritonitis or failed control.

Question 24 of 40 · Perforated diverticulitis

Q24. A 69-year-old patient with known diverticular disease is febrile and hypotensive, has a rigid abdomen, and CT demonstrates perforated sigmoid colon with diffuse intraperitoneal contamination. What treatment principle is essential?

A. Elective colonoscopy during acute sepsisB. Antibiotics alone with no surgical reviewC. Home treatment with antacidsD. Urgent source control with surgery plus resuscitation and antimicrobialsE. Observation without IV access

View detailed explanation, examiner trap and viva

Correct answer: D. Urgent source control with surgery plus resuscitation and antimicrobials

Why correct: Diffuse perforation-related peritonitis requires time-critical source control; operative strategy depends on physiology and contamination.

Why the other options are incorrect:

A. Elective colonoscopy during acute sepsis: Endoscopy risks worsening perforation and delays urgent care.

B. Antibiotics alone with no surgical review: Diffuse contamination and shock generally demand definitive surgical intervention.

C. Home treatment with antacids: Acid suppression does not treat colonic perforation or sepsis.

E. Observation without IV access: Shock needs immediate resuscitation and monitoring.

Exam pearl: Generalised peritonitis distinguishes severe complicated diverticulitis from uncomplicated disease.

Examiner trap: Do not confuse contained Hinchey abscess with faecal peritonitis.

Viva extension: What affects the choice of a Hartmann procedure? Haemodynamic stability, contamination and patient risk.

Question 25 of 40 · Large-bowel obstruction from malignancy

Q25. A 72-year-old with weight loss, progressive constipation and severe abdominal distension has CT showing an obstructing left-sided colonic mass with proximal large-bowel dilation. What is the appropriate next step?

A. Start chronic bulking laxatives and dischargeB. Perform routine elective colonoscopy as a delay tacticC. Assume irritable bowel syndromeD. Wait until the caecum perforates before interventionE. Urgent colorectal surgical assessment, resuscitation and planning of obstruction relief

View detailed explanation, examiner trap and viva

Correct answer: E. Urgent colorectal surgical assessment, resuscitation and planning of obstruction relief

Why correct: Malignant large-bowel obstruction requires inpatient surgical/colorectal assessment and a strategy for decompression, resection, or stenting in selected contexts.

Why the other options are incorrect:

A. Start chronic bulking laxatives and discharge: Mechanical obstruction may worsen and lead to perforation.

B. Perform routine elective colonoscopy as a delay tactic: Assessment/treatment must be prioritised; insufflation in an obstructed colon can be hazardous.

C. Assume irritable bowel syndrome: Weight loss and CT-defined obstructing mass exclude a functional diagnosis.

D. Wait until the caecum perforates before intervention: Progressive dilation and compromise require timely source control/decompression.

Exam pearl: Think of caecal perforation risk in distal large-bowel obstruction, especially with a competent ileocaecal valve.

Examiner trap: Stenting is not appropriate for every obstructed cancer; context and expertise matter.

Viva extension: How does a competent ileocaecal valve affect obstruction? It can create a closed-loop large-bowel system.

Question 26 of 40 · Ischaemic colitis

Q26. A 75-year-old develops crampy left-sided abdominal pain and passes maroon blood after an episode of transient hypotension. She is now stable with mild tenderness and no peritonitis. Which diagnosis is most compatible?

A. Ischaemic colitisB. Acute appendicitisC. Biliary colicD. Acute sigmoid volvulus without ischaemiaE. Gastric outlet obstruction

View detailed explanation, examiner trap and viva

Correct answer: A. Ischaemic colitis

Why correct: Transient colonic hypoperfusion commonly affects watershed regions and causes abdominal pain with haematochezia. Severe cases can progress to gangrene.

Why the other options are incorrect:

B. Acute appendicitis: Appendicitis primarily causes right iliac-fossa symptoms, not typical post-hypotensive left pain with bleeding.

C. Biliary colic: Biliary colic is upper abdominal and does not characteristically produce lower GI bleeding.

D. Acute sigmoid volvulus without ischaemia: Simple volvulus primarily causes distension/obstruction, not classic post-hypotensive bloody diarrhoea.

E. Gastric outlet obstruction: Would cause postprandial vomiting and upper digestive symptoms, not colonic bleeding.

Exam pearl: Ischaemic colitis often causes left-sided pain and bloody stool after hypoperfusion.

Examiner trap: Distinguish colonic hypoperfusion from embolic acute mesenteric ischaemia of the small bowel.

Viva extension: Which sites are watersheds? Splenic flexure (Griffith) and rectosigmoid junction (Sudeck).

Question 27 of 40 · Upper GI bleed immediate priority

Q27. A 58-year-old arrives with large-volume haematemesis, tachycardia and BP 84/48 mmHg. There are signs of poor perfusion. What should be prioritised before diagnostic endoscopy?

A. Immediate discharge on PPI tabletsB. Airway/perfusion assessment and active haemodynamic resuscitationC. Give large quantities of oral waterD. Perform elective colonoscopy firstE. Wait overnight without haemodynamic monitoring

View detailed explanation, examiner trap and viva

Correct answer: B. Airway/perfusion assessment and active haemodynamic resuscitation

Why correct: Major GI haemorrhage first requires stabilisation, vascular access, group/crossmatch and blood products when indicated. Endoscopy follows rapidly with ongoing support.

Why the other options are incorrect:

A. Immediate discharge on PPI tablets: Hypotensive haematemesis is a high-risk bleeding emergency.

C. Give large quantities of oral water: Oral intake is not appropriate during active major bleeding and aspiration risk.

D. Perform elective colonoscopy first: The presentation strongly indicates an upper source requiring acute stabilisation.

E. Wait overnight without haemodynamic monitoring: Active shock may worsen rapidly and requires resuscitation and urgent evaluation.

Exam pearl: Resuscitate first; therapeutic endoscopy is organised promptly once safe.

Examiner trap: A “normal” initial haemoglobin can coexist with acute haemorrhage before equilibration.

Viva extension: When may airway protection be required? Reduced consciousness, large-volume ongoing haematemesis or aspiration risk.

Question 28 of 40 · Melaena and endoscopy timing

Q28. A 60-year-old is admitted for melaena. He is now haemodynamically stable following fluids, without ongoing massive bleeding. What is a standard endoscopic timing goal for suspected upper GI bleeding?

A. Elective routine endoscopy in six monthsB. Always within five minutes regardless of shockC. Upper gastrointestinal endoscopy within 24 hours after presentation, with individual clinical prioritisationD. Only after repeat outpatient faecal occult blood testingE. No endoscopy because the patient is temporarily stable

View detailed explanation, examiner trap and viva

Correct answer: C. Upper gastrointestinal endoscopy within 24 hours after presentation, with individual clinical prioritisation

Why correct: ACG guidance supports endoscopy within 24 hours for admitted patients after stabilisation, unless specific severe indications alter timing.

Why the other options are incorrect:

A. Elective routine endoscopy in six months: Hospitalised suspected upper bleeding requires timely investigation and treatment.

B. Always within five minutes regardless of shock: Resuscitation and airway safety must not be sacrificed for an arbitrary timing target.

D. Only after repeat outpatient faecal occult blood testing: FOBT is not a substitute for endoscopy in clinically overt melaena.

E. No endoscopy because the patient is temporarily stable: Stability after resuscitation does not eliminate the need to evaluate the bleeding source.

Exam pearl: Urgent endoscopy means clinically timely after resuscitation—not universally before stabilisation.

Examiner trap: A single rigid clock-time rule ignores active bleeding and comorbidity.

Viva extension: What score stratifies UGIB prior to endoscopy? Glasgow-Blatchford score.

Question 29 of 40 · Suspected variceal bleeding

Q29. A cirrhotic patient presents with brisk haematemesis, hypotension and stigmata of chronic liver disease. In addition to resuscitation, which management package is important before definitive endoscopic haemostasis?

A. Only an oral antacid and routine reviewB. High-fibre diet immediatelyC. No antibiotics because the bleed is not infectiousD. Early vasoactive therapy and antibiotic prophylaxis under the suspected variceal bleeding pathwayE. Stop resuscitation until endoscopy starts

View detailed explanation, examiner trap and viva

Correct answer: D. Early vasoactive therapy and antibiotic prophylaxis under the suspected variceal bleeding pathway

Why correct: Cirrhotic variceal bleeding has high infection and rebleeding risk. Vasoactive drugs, antimicrobial prophylaxis and timely therapeutic endoscopy are components of evidence-based care.

Why the other options are incorrect:

A. Only an oral antacid and routine review: This omits major supportive and haemostatic interventions.

B. High-fibre diet immediately: Active haematemesis risks aspiration and needs acute haemorrhage management.

C. No antibiotics because the bleed is not infectious: Prophylactic antibiotics reduce complications in cirrhotic variceal bleeding.

E. Stop resuscitation until endoscopy starts: Physiological stabilisation remains essential during the haemostatic plan.

Exam pearl: Suspected varices merit an early specialist bundle beyond routine nonvariceal UGIB care.

Examiner trap: Not all upper bleeding is peptic ulcer disease.

Viva extension: What intervention provides endoscopic variceal haemostasis? Endoscopic band ligation, where appropriate.

Question 30 of 40 · Brisk upper bleed mimics lower

Q30. A shocked 66-year-old has passed a large volume of fresh red blood per rectum. He also reports two episodes of coffee-ground vomiting earlier today. Which statement is most accurate?

A. Fresh rectal blood always arises distal to the ligament of TreitzB. Coffee-ground vomitus excludes upper GI bleedingC. No resuscitation is needed because stool is redD. Only haemorrhoids can produce bright red bloodE. A brisk upper gastrointestinal haemorrhage can cause haematochezia

View detailed explanation, examiner trap and viva

Correct answer: E. A brisk upper gastrointestinal haemorrhage can cause haematochezia

Why correct: Rapid transit from a high-volume upper GI bleed can produce red rectal bleeding; the history and shock must guide source localisation.

Why the other options are incorrect:

A. Fresh rectal blood always arises distal to the ligament of Treitz: Very brisk upper bleeding may present with haematochezia.

B. Coffee-ground vomitus excludes upper GI bleeding: Coffee-ground emesis is itself evidence of an upper source.

C. No resuscitation is needed because stool is red: Shock is an immediate resuscitation indication irrespective of colour.

D. Only haemorrhoids can produce bright red blood: Many colonic and brisk upper sources can cause haematochezia.

Exam pearl: Haematochezia does not reliably exclude a high-volume upper GI source.

Examiner trap: Do not equate a visual descriptor with definitive localisation.

Viva extension: What alternative features help localise? Haematemesis, melaena, nasogastric findings when appropriate and endoscopy/CTA.

Question 31 of 40 · Ectopic pregnancy with shock

Q31. A 29-year-old with a positive pregnancy test has sudden lower abdominal pain, shoulder-tip discomfort, syncope and hypotension. There is free pelvic fluid on bedside ultrasound. What is the most urgent action?

A. Immediate resuscitation and emergency gynaecological assessment for ruptured ectopic pregnancyB. Repeat beta-hCG in 48 hours before any further managementC. Routine oral antiemetics and dischargeD. Elective outpatient MRI of the pelvisE. Manage as irritable bowel syndrome

View detailed explanation, examiner trap and viva

Correct answer: A. Immediate resuscitation and emergency gynaecological assessment for ruptured ectopic pregnancy

Why correct: Haemodynamic instability with positive pregnancy test and pelvic free fluid is highly concerning for ruptured ectopic pregnancy; operative care may be required without delay.

Why the other options are incorrect:

B. Repeat beta-hCG in 48 hours before any further management: Serial hCG is inappropriate as the primary response to haemodynamic collapse.

C. Routine oral antiemetics and discharge: The clinical picture suggests life-threatening intra-abdominal haemorrhage.

D. Elective outpatient MRI of the pelvis: The patient requires emergency care and possible surgery.

E. Manage as irritable bowel syndrome: Functional bowel disease does not explain positive pregnancy, shock and haemoperitoneum.

Exam pearl: Always consider haemoperitoneum from ectopic pregnancy in the appropriate patient.

Examiner trap: Discriminatory hCG thresholds do not trump shock.

Viva extension: What causes shoulder-tip pain? Irritation of the diaphragm from intraperitoneal blood.

Question 32 of 40 · Pyonephrosis / obstructed infected kidney

Q32. A 55-year-old has fever, chills and flank pain. CT demonstrates an obstructing proximal ureteric stone and hydronephrosis. She is hypotensive with high inflammatory markers. What is the key source-control step alongside resuscitation and IV antibiotics?

A. Elective stone extraction months later without drainage nowB. Urgent decompression of the obstructed collecting system by stent or nephrostomyC. Oral analgesia onlyD. Simple reassurance because stones are commonE. Immediate ESWL before stabilising sepsis

View detailed explanation, examiner trap and viva

Correct answer: B. Urgent decompression of the obstructed collecting system by stent or nephrostomy

Why correct: Infected obstruction is a urological sepsis emergency. Antibiotics alone cannot reliably control infection trapped behind an obstruction.

Why the other options are incorrect:

A. Elective stone extraction months later without drainage now: Delaying decompression risks septic shock and kidney injury.

C. Oral analgesia only: Analgesia does not correct obstructed infection.

D. Simple reassurance because stones are common: Fever plus obstruction can be fatal even in routine stone disease.

E. Immediate ESWL before stabilising sepsis: Definitive stone treatment usually follows control of infection and drainage.

Exam pearl: Infection plus urinary obstruction requires antibiotics and drainage.

Examiner trap: Uninfected renal colic is a different algorithm from obstructive pyelonephritis.

Viva extension: What are the two major decompression choices? Retrograde ureteric stent and percutaneous nephrostomy.

Question 33 of 40 · Testicular torsion as abdominal pain

Q33. A 15-year-old boy has acute lower abdominal pain and vomiting. On targeted examination, his left testicle is high-riding and markedly tender with an absent cremasteric reflex. What is the appropriate priority?

A. Treat as constipation with oral laxativesB. Wait for routine ultrasound tomorrowC. Urgent urological/surgical exploration without delaying for imaging when clinical suspicion is highD. Prescribe antibiotics as if it must be epididymitisE. Elective review in one week

View detailed explanation, examiner trap and viva

Correct answer: C. Urgent urological/surgical exploration without delaying for imaging when clinical suspicion is high

Why correct: Time-sensitive spermatic cord torsion threatens testicular viability. A clinically convincing case needs immediate expert surgical action.

Why the other options are incorrect:

A. Treat as constipation with oral laxatives: The genital findings signal a torsion emergency.

B. Wait for routine ultrasound tomorrow: Imaging should not delay exploration in high-suspicion torsion.

D. Prescribe antibiotics as if it must be epididymitis: The sudden onset and examination are more consistent with torsion.

E. Elective review in one week: The salvage window is time-critical.

Exam pearl: Always examine the scrotum in an adolescent boy with unexplained acute lower abdominal pain.

Examiner trap: A palpable testis or partial pain improvement does not exclude torsion.

Viva extension: What is the usual definitive procedure? Detorsion and bilateral orchidopexy if viable.

Question 34 of 40 · Post colonoscopy peritonitis

Q34. A 67-year-old becomes severely distressed several hours after colonoscopy, with tachycardia, generalised guarding and CT showing free air with a large colonic defect. What should be done?

A. Arrange a routine outpatient review in six weeksB. Repeat colonoscopy purely to inspect the defect without resuscitationC. Give laxatives to pass the free gasD. Immediate resuscitation, antibiotics and urgent operative or expert source-control assessmentE. Reassure that pain and shock are normal after colonoscopy

View detailed explanation, examiner trap and viva

Correct answer: D. Immediate resuscitation, antibiotics and urgent operative or expert source-control assessment

Why correct: A clinically significant perforation with peritonitis following colonoscopy requires emergency multidisciplinary management and source control.

Why the other options are incorrect:

A. Arrange a routine outpatient review in six weeks: Peritonitis and perforation cannot safely wait.

B. Repeat colonoscopy purely to inspect the defect without resuscitation: Endoscopic approaches may be suitable in selected contained early perforations, but diffuse peritonitis demands urgent stabilisation and source-control planning.

C. Give laxatives to pass the free gas: Free intraperitoneal air is not treated by bowel motions.

E. Reassure that pain and shock are normal after colonoscopy: Generalised rigidity and shock are major complication signs.

Exam pearl: Small contained endoscopic perforations are different from diffuse contamination.

Examiner trap: Do not use universal “all perforations get clips” reasoning with peritonitis.

Viva extension: What factors decide endoscopic closure versus operation? Defect size, timing, contamination and physiology.

Question 35 of 40 · Neonatal bilious vomiting

Q35. A 2-day-old neonate develops green bilious vomiting and increasing abdominal distension. The infant is lethargic. Which urgent diagnosis must be considered and managed through a paediatric surgical pathway?

A. Simple infant reflux requiring reassuranceB. Physiological posseting after feedsC. Routine constipation with home remediesD. Normal transitional stool patternE. Malrotation with midgut volvulus

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Correct answer: E. Malrotation with midgut volvulus

Why correct: Bilious vomiting in a neonate is an obstruction emergency until proven otherwise; malrotation with volvulus can rapidly compromise bowel blood flow.

Why the other options are incorrect:

A. Simple infant reflux requiring reassurance: Green bile-stained emesis in a sick neonate is not routine reflux.

B. Physiological posseting after feeds: Posseting is nonbilious and does not explain lethargy and progressive distension.

C. Routine constipation with home remedies: Possible midgut volvulus requires emergency care.

D. Normal transitional stool pattern: A newborn with bilious vomiting must be assessed for surgical obstruction.

Exam pearl: Bilious neonatal vomiting is a surgical red flag.

Examiner trap: Do not wait for frank rectal bleeding as evidence of bowel ischaemia.

Viva extension: Which operation treats malrotation with volvulus? A Ladd procedure with detorsion and correction of obstructing bands as needed.

Question 36 of 40 · Paediatric intussusception

Q36. An 11-month-old has episodic crying, draws up his legs, vomits, and between episodes becomes relatively calm. Ultrasound shows a target/doughnut sign. What is the likely diagnosis?

A. Ileocolic intussusceptionB. Acute appendicitis as the usual infant diagnosisC. Gallstone pancreatitisD. Meckel-related painless rectal bleeding aloneE. Infantile pyloric stenosis

View detailed explanation, examiner trap and viva

Correct answer: A. Ileocolic intussusception

Why correct: Paroxysmal pain in an infant with a sonographic target sign is typical of intussusception; reduction may be radiological when stable and without contraindications.

Why the other options are incorrect:

B. Acute appendicitis as the usual infant diagnosis: Appendicitis is less common in this age group and the imaging target supports intussusception.

C. Gallstone pancreatitis: Unlikely at this age and does not produce a sonographic bowel target sign.

D. Meckel-related painless rectal bleeding alone: Meckel diverticulum may act as a lead point but is not the immediate diagnosis defined by the target sign.

E. Infantile pyloric stenosis: Pyloric stenosis causes nonbilious projectile vomiting, usually without intermittent colicky pain and intestinal target sign.

Exam pearl: Target sign and episodic pain suggest intussusception.

Examiner trap: Currant-jelly stool is a late feature and need not be present.

Viva extension: When is pneumatic/contrast enema contraindicated? Peritonitis, perforation or severe shock.

Question 37 of 40 · Appendicitis in pregnancy — modality

Q37. A pregnant patient at 18 weeks has right-sided abdominal pain and suspected appendicitis. She is stable and requires imaging. Which study is commonly preferred as a first step when appropriately available?

A. Routine CT without first considering appropriate radiation-sparing modalitiesB. Ultrasound examination with MRI if ultrasound is non-diagnostic and suspicion remainsC. No imaging is permitted in pregnancyD. Only a plain abdominal radiographE. Wait until after delivery for any further assessment

View detailed explanation, examiner trap and viva

Correct answer: B. Ultrasound examination with MRI if ultrasound is non-diagnostic and suspicion remains

Why correct: Ultrasound avoids ionising radiation and can assess appendicitis/other causes; MRI is useful when US is inconclusive and clinical suspicion persists.

Why the other options are incorrect:

A. Routine CT without first considering appropriate radiation-sparing modalities: CT may be justified when needed, but is not the routine first choice in a stable pregnancy if suitable alternatives are available.

C. No imaging is permitted in pregnancy: Appropriate imaging is important to diagnose dangerous conditions.

D. Only a plain abdominal radiograph: It is less useful in suspected appendicitis than targeted ultrasound/MRI.

E. Wait until after delivery for any further assessment: Untreated appendicitis can threaten both patient and fetus.

Exam pearl: Choose the imaging method based on pregnancy and clinical urgency.

Examiner trap: Avoid both unjustified radiation and dangerous delays in necessary diagnosis.

Viva extension: What if clinical status deteriorates? Urgent specialist assessment and operative management should not wait for perfect imaging.

Question 38 of 40 · Obstruction danger with lactate

Q38. A 67-year-old has an incarcerated ventral hernia and persistent severe pain. Lactate is 1.6 mmol/L. The abdomen is tender over the hernia and obstruction is seen on CT. What is the safest interpretation?

A. Normal lactate proves the bowel is viableB. The hernia can always be reduced forcefullyC. A normal lactate does not exclude bowel strangulationD. Antibiotics alone resolve mechanical incarcerationE. Discharge safely based only on lactate

View detailed explanation, examiner trap and viva

Correct answer: C. A normal lactate does not exclude bowel strangulation

Why correct: Serum lactate can be normal early in compromised bowel; continuous pain, hernia findings and CT determine urgency.

Why the other options are incorrect:

A. Normal lactate proves the bowel is viable: Lactate lacks adequate sensitivity for early ischaemia.

B. The hernia can always be reduced forcefully: Forceful reduction can be dangerous when strangulation is suspected.

D. Antibiotics alone resolve mechanical incarceration: Antimicrobials do not release trapped bowel.

E. Discharge safely based only on lactate: Potential strangulation requires emergency surgical review.

Exam pearl: Clinical pattern and imaging supersede a single reassuring lactate.

Examiner trap: Avoid “negative” biomarkers as rule-out tests for time-critical pathology.

Viva extension: What is the mechanism of strangulation? Mesenteric vascular compromise secondary to trapped bowel.

Question 39 of 40 · Intra-abdominal source control

Q39. A 59-year-old deteriorates from intra-abdominal sepsis despite appropriate broad-spectrum IV antibiotics. CT shows a large walled-off infected postoperative collection. What additional management principle is critical?

A. Escalate antibiotic spectrum indefinitely without source assessmentB. Stop all antimicrobial therapy despite sepsisC. Start only oral antispasmodicsD. Drainage or operative source control of the infected collectionE. Discharge because the abscess is “walled off”

View detailed explanation, examiner trap and viva

Correct answer: D. Drainage or operative source control of the infected collection

Why correct: Antibiotics may not penetrate/clear a sizable undrained focus. Source control by image-guided drainage or operation is essential when indicated.

Why the other options are incorrect:

A. Escalate antibiotic spectrum indefinitely without source assessment: Broader cover alone cannot reliably eliminate an undrained collection.

B. Stop all antimicrobial therapy despite sepsis: Active infection requires treatment and reassessment.

C. Start only oral antispasmodics: Antispasmodics have no source-control role.

E. Discharge because the abscess is “walled off”: A contained collection can cause persistent sepsis and still needs treatment.

Exam pearl: Source control is a cornerstone of surgical infection management.

Examiner trap: Do not confuse “contained” with “harmless.”

Viva extension: Give examples of source control: Drain abscess, repair perforation, resect necrotic bowel or decompress obstructed infected ducts.

Question 40 of 40 · Safe discharge after pain resolution

Q40. A 28-year-old with self-limiting lower abdominal pain is currently stable, comfortable, tolerating oral intake, pregnancy test is negative, and targeted examination/investigations do not suggest a surgical emergency. What is essential if discharged?

A. Promise that appendicitis is impossible nowB. Advise avoiding any return even with feverC. Discard all investigation resultsD. Withhold any explanation of the working diagnosisE. Clear written safety-net advice and an explicit plan for reattendance if symptoms worsen

View detailed explanation, examiner trap and viva

Correct answer: E. Clear written safety-net advice and an explicit plan for reattendance if symptoms worsen

Why correct: Acute abdomen assessment is dynamic. Safety-netting addresses evolving appendicitis/obstruction and indicates warning symptoms and timely follow-up.

Why the other options are incorrect:

A. Promise that appendicitis is impossible now: No single point assessment can guarantee every early evolving cause is absent.

B. Advise avoiding any return even with fever: New fever, persistent vomiting, worsening pain or collapse require reassessment.

C. Discard all investigation results: Documentation and communication are key components of safe care.

D. Withhold any explanation of the working diagnosis: Shared understanding and return precautions improve patient safety.

Exam pearl: Clinical reassessment and safety-netting are part of treatment, not administrative extras.

Examiner trap: A negative test today may not fully exclude evolving disease tomorrow.

Viva extension: Which symptoms demand return? Increasing pain, vomiting, fever, syncope, jaundice, rectal bleeding or inability to pass stool/flatus.

Frequently asked questions

Do I need imaging before every emergency laparotomy?

No. In profound shock with generalised peritonitis, immediate resuscitation and senior source-control assessment take priority. Stable diagnostic uncertainty commonly benefits from targeted CT or ultrasound.

Does a normal lactate exclude ischaemic bowel?

No. Lactate may be normal early, especially in mesenteric ischaemia. The clinical pattern, CTA and examination guide action.

Can uncomplicated appendicitis ever be treated with antibiotics?

Selected uncomplicated cases can be offered an antibiotic-first approach after shared discussion of failure and recurrence. This does not apply to diffuse perforation-related peritonitis.

Is every sigmoid volvulus an immediate laparotomy?

No. Uncomplicated viable sigmoid volvulus may undergo urgent endoscopic detorsion. Peritonitis, infarction or perforation requires surgery.

Is early ERCP necessary in every gallstone pancreatitis?

No. Cholangitis or continuing biliary obstruction is an important indication; routine urgent ERCP is not used for uncomplicated gallstone pancreatitis.

What makes an obstructed kidney an emergency?

Fever or sepsis plus urinary tract obstruction requires antibiotics and urgent drainage through a stent or nephrostomy.

Why should I examine the groin and scrotum?

Strangulated hernias and testicular torsion can present with abdominal pain and may be missed when the examination is limited.

How does progress saving work?

Checklist ticks, graded answers and your last question are stored locally in this browser. Data do not sync between devices; clearing browser data can remove them.

References and related MRCS lessons

Educational content for exam preparation. Management decisions must be individualised to clinical condition and current local protocols. The external documents support medical concepts, not claims about confidential MRCS recalls.

1. MRCS official candidate guidance
2. WSES 2020 acute appendicitis guidelines
3. WSES Bologna guidelines on adhesive small-bowel obstruction
4. WSES 2022 acute mesenteric ischaemia guidelines
5. NICE CG188: Gallstone disease
6. NICE NG104: Pancreatitis
7. ESGE: Endoscopic management of common bile duct stones
8. WSES 2023: Sigmoid volvulus
9. ACG guideline on upper gastrointestinal bleeding
10. NICE NG126: Ectopic pregnancy and miscarriage

Published MRCS Academy lessons

Article 01
Start MRCS HereArticle 02
Complete SyllabusArticle 03
Books and ResourcesArticle 04
12-Week Study PlanArticle 05
SBA Question StrategyArticle 06
Common Preparation MistakesArticle 07
Surgical Anatomy OverviewArticle 08
Upper Limb AnatomyArticle 09
Inguinal & Abdominal WallArticle 10
Head & Neck Surgical AnatomyArticle 11
Cardiovascular & Respiratory PhysiologyArticle 12
Renal & Acid–Base PhysiologyArticle 13
GI, Endocrine & NeurophysiologyArticle 14
Lower Limb Surgical Anatomy Made Easy for MRCS Part AArticle 15
Thoracic, Pelvic and Visceral Surgical AnatomyArticle 16
Surgical Pathology, Inflammation and Wound Healing Made Easy for MRCS Part AArticle 17
Surgical Pharmacology and Microbiology Made Easy for MRCS Part AArticle 18
Perioperative Care, Anaesthesia and Surgical Complications Made Easy for MRCS Part AArticle 19
Trauma, Shock and Burns Made Easy for MRCS Part A

Previous lesson: Article 19 — Trauma, Shock and Burns

Next planned: Article 21 — Common Surgical Specialty Presentations. Link will be added after it is published.

FreeMedSite MRCS independent education · Reviewed 16 October 2026. Original clinical SBAs, not reproduced exam recalls.