Case Report
Copyright ©2007 Baishideng Publishing Group Co., Limited. All rights reserved.
World J Gastroenterol. Jan 21, 2007; 13(3): 467-469
Published online Jan 21, 2007. doi: 10.3748/wjg.v13.i3.467
Rectal angiolipoma diagnosed after surgical resection: A case report
Mitsuru Ishizuka, Hitoshi Nagata, Kazutoshi Takagi, Toru Horie, Akihito Abe, Keiichi Kubota
Mitsuru Ishizuka, Hitoshi Nagata, Kazutoshi Takagi, Toru Horie, Akihito Abe, Keiichi Kubota, Department of Gastroenterological Surgery, Dokkyo University School of Medicine, Tochigi, Japan
Author contributions: All authors contributed equally to the work.
Correspondence to: Mitsuru Ishizuka, MD, Department of Gastroenterological Surgery, Dokkyo University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan. mm-ishizuka@umin.ac.jp
Telephone: +81-282-872158 Fax: +81-282-866317
Received: September 28, 2006
Revised: October 25, 2006
Accepted: December 11, 2006
Published online: January 21, 2007
Abstract

Angiolipoma is a common benign tumor with a characteristic vascular component that usually occurs in subcutaneous tissue. Although lipomas are frequently encountered at colonoscopy as submucosal tumors, angiolipomas are rarely found in the gastrointestinal tract including the large intestine. Here we report a 77-year old Japanese man who underwent transanal resection of a tumor that was diagnosed tentatively as a leiomyoma. Histologically, the tumor consisted of mature fat cells and blood vessels. Immunohistochemically, the tumor cells were negative for c-kit and HMB-45, which are consistently expressed in tumors such as gastrointestinal stromal tumor and angiomyolipoma. The tumor was therefore diagnosed as an angiolipoma. This is thought to be the first case report of a surgically resected angiolipoma of the rectum.

Keywords: Angiolipoma; Angiomyolipoma; Gastrointestinal stromal tumor