The Authors report a case of acute abdomen caused by a perforated solitary diverticulum of the cecum recently treated. This is a rare disease that usually is diagnosed, in the surgical theatre because it is a topic of emergency surgery. From Literature analysis it is obvious that a correct preoperative diagnosis is difficult to make because of the large number of possible abdominal pathologies with similar symptoms. Also the therapeutic approach is so extremely variable that the operation could range from a simple conservative type to right hemicolectomy. A proper approach will be conservative with a simple diverticulectomy when the inflammatory reaction is localized in the colonic wall while a right colectomy could be performed when the inflammatory reaction is more advanced or a large mass suggestive of a carcinoma is present.