An unusual "tumor" of the cecum: the inverted appendiceal stump.

Intussusception of the appendix in adult represents an uncommon entity. We report a 54-year old woman who underwent an appendectomy 24 years previously and who was hospitalized for changes in bowel habits and periumbilical and epigastric pain. A sessile polypoid tumor of cecum was discovered during colonoscopy, which was removed. Histopathological examination showed that it was the case of an inverted appendiceal stump. Authors present reviews of the literature concerning clinical features, associated conditions, diagnosis, classification and therapy of this extremely rare condition.