Abstract
A patient, 81-year-old female, came to see her private physician with complaints of fever and right lower abdominal pain. The patient was admitted to our hospital with possible diagnosis of acute appendicitis. Physical examination revealed a fist sized tumor accompanied with tenderness and peritoneal irritation sign in the right lower quadrant of the abdomen. A flat plate of abdomen revealed a tumor like shadow with irregular consistency. A CT study revealed a cystic tumor with ring like peripheral calcification with long diameter of about 60 mm, connecting to the lumen of the ascending colon. Diagnosis of a giant diverticulum of the colon was made and ileocecal resection was performed on the following day. Histopathological study revealed lack of muscular layer in the diverticulum and was diagnosed as pseudodiverticulum with severe inflammation. This is the report of our experience of surgical resection of diverticulum of the ascending colon which was difficult to differentiate from acute appendicitis. We report this case with some review of literatures.