- Etiology: urachus is canal connecting bladder of fetus with allantois which is a structure that contributes to formation of umbilical cord, lumen of urachus normally obliterated during embryonic development which transforms urachus into solid cord / functionless remnant
- Imaging: US to demonstrate findings:
— Patent urachus – bladder communicates with umbilicus
— Urachal sinus – starts at umbilicus and terminates blindly along tract
— Urachal cyst – urachus closed at each end with cyst in middle
— Urachal diverticulum – starts at bladder and terminates blindly along tract - Clinical: may have umbilical discharge of pus or urine, inflammed anterior abdominal wall
Radiology Cases of Urachal Remnant
Radiology Cases of Urachal Cyst

Radiology Cases of Patent Urachus

Radiology Cases of Urachal Diverticulum

