[A Case of Appendiceal Intussusception Induced by Early Appendiceal Carcinoma].

Appendiceal intussusception is an uncommon pathologic condition. We report herein a case of appendiceal intussusception induced by appendiceal carcinoma. A 76-year-old woman was admitted to hospital because of epigastric pain. CT scan showed multiple concentric ring sign in ascending colon and enhanced tumor in transverse colon. Colonoscopy showed invagination of polypoid lesion which was pushed back to cecum endoscopically. Laparoscopy-assisted ileocecal resection with regional lymph node dissection was performed for cecal cancer. During surgery, the appendix was found to be inverted completely into the cecum. The tumor was 70×35 mm in size in the cecal cavity, and the appendix had completely invaginated into the cecum at its base. Histopathologic examination revealed early appendiceal carcinoma. The patient is healthy without recurrence.