Case Report
Copyright ©2008 The WJG Press and Baishideng. All rights reserved.
World J Gastroenterol. Sep 14, 2008; 14(34): 5353-5355
Published online Sep 14, 2008. doi: 10.3748/wjg.14.5353
Inflammatory myoglandular polyp causing hematochezia
Shoji Hirasaki, Masato Okuda, Kenichiro Kudo, Seiyuu Suzuki, Atsuko Shirakawa
Shoji Hirasaki, Masato Okuda, Kenichiro Kudo, Seiyuu Suzuki, Department of Internal Medicine, Sumitomo Besshi Hospital, Niihama 7928543, Japan
Atsuko Shirakawa, Department of Pathology, Sumitomo Besshi Hospital, Niihama 7928543, Japan
Author contributions: Hirasaki S, Okuda M, Kudo K and Suzuki S were involved in the care of the patient; Shirakawa A studied the specimen; Hirasaki S performed the endoscopic resection; Hirasaki S wrote the paper.
Correspondence to: Shoji Hirasaki, Department of Internal Medicine, Sumitomo Besshi Hospital, 3-1 Ohji-cho, Niihama 7928543, Japan. shoji_hirasaki@ni.sbh.gr.jp
Telephone: +81-897-377111 Fax: +81-897-377121
Received: April 18, 2008
Revised: August 11, 2008
Accepted: August 18, 2008
Published online: September 14, 2008
Abstract

A case of inflammatory myoglandular polyp (IMGP) causing hematochezia is reported. The patient was a 33-year-old man who visited our hospital for further evaluation of hematochezia. Colonoscopy revealed a red, hard, spherical peduncular polyp with erosion and mucous exudation, about 20 mm in diameter, in the descending colon. Excluding the polyp, there was no lesion in the colorectum. Endoscopic polypectomy was performed. Histological examination of the specimen revealed inflammatory granulation tissue in the lamina propria, proliferation of smooth muscle, and hyperplastic glands with variable cystic changes. This polyp was diagnosed as an IMGP. The symptom of hematochezia was resolved after endoscopic resection. Our case shows that treatment is necessary for IMGP if intestinal bleeding occurs and endoscopists should be aware of the endoscopic characteristics of IMGP.

Keywords: Inflammatory myoglandular polyp, Colonoscopy, Endoscopic polypectomy, Gastrointestinal bleeding