Appendiceal Diverticulitis and Epithelialization of the Serosal Surface

The appendix is a very common specimen in any pathology department because its disorders especially the benign ones are relatively common. Appendiceal diverticulitis can present acutely with a clinical picture resembling that of an acute appendicitis. This report is of two cases which were admitted to our hospital's Emergency Department with acute abdominal pain and in which reactive epithelium covering the appendiceal outer serosal surface was noticed on microscopic examination. This curious phenomenon might have been seen before by surgical pathologists, but it has not been reported so far.