THE UNUSUAL PRESENTATION OF MUCINOUS CARCINOMA IN THE COLON MAKING PREOPERATIVE DIAGNOSIS DIFFICULT - REPORT OF A CASE

A 51-year-old man was admitted to our hospital for investigation of fe ver, lower abdominal pain, and pain on micturition. Barium enema acid endoscopic findings revealed an extracanal large cavity of the rectosi gmoid colon, which suggested an abscess caused by penetration. Histolo gical examination of the endoscopic biopsy specimen demonstrated no ma lignancy. A preoperative diagnosis of malignant lymphoma was strongly suspected from the imaging findings; however, intraoperative inspectio n revealed a large tumor invading the urinary bladder. An intraoperati ve incisional biopsy was performed and histological examination demons trated mucinous carcinoma. The patient subsequently underwent pelvic e xenteration about 1 week later followed by adjuvant chemotherapy and r adiotherapy.