title: [Urachal cyst with stone: a case report].
abstract: A 52-year-old woman complained of persistent discharge from an umbilicus which she had for 18 years. Abdominal X-ray showed a stone-like shadow measuring 5 x 3 cm at the 5th lumbar spine. Cystoscopic examination revealed a hole at the dome of the bladder and a ureteral catheter was inserted approximately 3 cm through the hole. Computerized tomography scan and magnetic resonance imaging demonstrated a cyst communicating to the umbilicus and bladder. The preoperative diagnosis was a patient urachus associated with stone. Urachal cyst containing a stone was removed and partial cystectomy was performed. The stone was a mixture of magnesium ammonium phosphate and calcium phosphate. Pathological examination showed no evidence of malignancy. More than 210 cases of urachal cyst have been reported in Japan. About 10% of the cases were associated with stones.
authors.affiliation: Department of Urology, Kawasaki Municipal Hospital.
authors.forename: H
authors.initials: H
authors.lastname: Tanomogi
authors.forename: T
authors.initials: T
authors.lastname: Masuda
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: I
authors.initials: I
authors.lastname: Yokoyama
authors.forename: K
authors.initials: K
authors.lastname: Nouga
mesh_terms: D005260:Female; D006801:Humans; D008875:Middle Aged; D014496:Urachal Cyst / Q000150:complications*; D001744:Urinary Bladder Calculi / Q000150:complications*