Aseptic Abscess of the Gallbladder Mimicking Gallbladder Carcinoma after Surgery for Ulcerative Colitis

Gallbladder abscess is extremely rare. Aseptic abscesses are sometimes observed in patients with active ulcerative colitis (UC) with no history of colectomy; however, it is rare for an aseptic abscess in the gallbladder to develop after surgery for UC. We treated a 56-year-old man with UC and severe pouchitis who had undergone subtotal colorectal resection. A gallbladder lesion was noted during treatment for pouchitis, which increased in size. Therefore, the patient underwent cholecystectomy for suspected gallbladder cancer. A pathological examination revealed an aseptic abscess. This clinical report describes a rare case of an aseptic abscess in the gallbladder after surgery for UC.