Urachal Remnant

• 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, transforming urachus into solid cord / functionless remnant
  — 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
• Imaging: US to demonstrate findings
• Clinical: may have umbilical discharge of pus or urine, inflammed anterior abdominal wall along omphalovesical duct / ligament

Cases of Urachal Remnant