Urachal fistula

A urachal fistula is a congenital disorder caused by the persistence of the allantois (later, urachus), the structure that connects an embryo's bladder to the yolk sac. Normally, the urachus closes off to become the median umbilical ligament; however, if it remains open, urine can drain from the bladder to an opening by the umbilicus.^[1]

Abdominal

Kidney	Renal agenesis/Potter sequence, Papillorenal syndrome cystic Polycystic kidney disease Meckel syndrome Multicystic dysplastic kidney Medullary sponge kidney Horseshoe kidney Renal ectopia Nephronophthisis Supernumerary kidney Dent's disease Alport syndrome

Ureter	Ectopic ureter Megaureter Duplicated ureter

Pelvic

Bladder	Bladder exstrophy

Urethra	Epispadias Hypospadias Posterior urethral valves

Vestigial

Urachus	Urachal cyst Urachal fistula

References

↑ Sadler, Thomas W. (2011-12-15). Langman's Medical Embryology. Lippincott Williams & Wilkins. ISBN 9781451113426.

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