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Potter Sequence

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Medical High-Yield

Potter Sequence & Renal Embryology

The pathophysiology of "Babies who can't pee in utero"

High-Yield Embryology

Pronephros Week 4 (Degenerates)
Mesonephros Week 5 (Transient)
Metanephros Week 8+ (Permanent)

Board Exam Pearl:

Ureteric Bud: Ureter, Pelvis, Calyces, Collecting Ducts.

Metanephric Mesenchyme: Glomerulus to DCT.

Renal Failure in Utero

Bilateral Renal Agenesis • ARPKD • Obstructive Uropathy

Oliguria / Anuria

OLIGOHYDRAMNIOS

Mechanical Impact

  • • Flattened "Potter" Facies
  • • Clubfoot / Limb Bowing
  • • Redundant Skin Folds

Physiological Impact

Pulmonary Hypoplasia: Lack of fluid aspiration stretches alveoli. Fatal complication.

The POTTER Sequence

P

Pulmonary

O

Oligo

T

Twisted Face

T

Twisted Skin

E

Extremity

R

Renal Failure

End of High Yield Post

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