Abstract
A 42-year-old woman presented with a 3-day history of peri-umbilical pain and fever. She had suffered from sigmoid colon diverticulitis 2 years earlier and had been treated with conservative therapy. Abdominal computed tomography revealed urachal abscess, suggestive of communication with the sigmoid colon. After management with abscess drainage and antibiotic administration, en bloc resection of the urachal mass, sigmoid colon and bladder cuff was performed. Urachal-sigmoid colon fistula caused by diverticulitis is extremely rare and only 4 cases, including ours, have been reported in Japan. We report this case with a review of the literature.
