A Case Report of Villous Adenoma of the Appendix with Cecal Intussusception

Abstract

The patient was a 72-year-old man complaining of discomfort at defecation. Colography revealed an elevated lesion at the base of the appendix. Endoscopic view showed atumor at the orifice of the appendix with discharge of mucin. The biopsy specimen was diagnosed as tubulo-villous adenoma. Ileocecal resection was performed under the diagnosis of an appendicular tumor. The resected specimen showed a polypoid tumor, 25×11mm in size, at the base of the appendix with intussusception into the cecum. The tumor was histologically diagnosed as villous adenoma. Villous tumor of the appendix is uncommon with only ten reported cases including ours in Japan. Seven of the ten tumors were villous adenoma, and intussusception had ocurred in five of the ten patients.