DIFFUSED VASCULAR MALFORMATION OF THE ENTIRE COLON: UNUSUAL ETIOLOGY OF GASTROINTESTINAL BLEEDING IN PEDIATRICS.

264 Copyright © 2020 The Authors. Published by Wolters Kluwer Health, Inc. Gastroenterology Nursing on behalf of the Society of Gastroenterology Nurses and Associates The causes of gastrointestinal (GI) bleeding in pediatrics are diverse. Unlike Meckel's diverticulum, anal fissure, polyps, inflammatory bowel disease, and infectious colitis, vascular malformation is not typically considered an etiology of GI bleeding in pediatrics, which can easily cause a delay in diagnosis or be misdiagnosed as reported (Abdoon, 2010; Al-Mehaidib, Alnassar, & Alshamrani, 2009). Vascular malformation, as an important cause of lower GI bleeding, is usually diagnosed in the elderly (Sami, Al-Araji, & Ragunath, 2014). It can affect any segment of the tract, usually the cecum and right colon in adults (Nishimura et al., 2015). Previous studies on children have shown that segmental lesions in the GI tract were found (Abdoon, 2010; Al-Mehaidib et al., 2009; Chuang et al., 2011; de la Torre Mondragón, Gómez, Mora Tiscarreño, & Ramírez Mayans, 1995; Uhlig, Stephan, Deutscher, Kiess, & Richter, 2004), but involvement of the entire colon is rare. In this case, we report an Asian boy presenting with GI bleeding diagnosed as diffused vascular malformation of the entire colon. DIFFUSED VASCULAR MALFORMATION OF THE ENTIRE COLON: UNUSUAL ETIOLOGY OF GASTROINTESTINAL BLEEDING IN PEDIATRICS