Potter Sequence

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