ArterioVenous Malformation within Jejunal Diverticulum: An Unusual Cause of Massive Gastrointestinal Bleeding
Figure 2
Histopathologic examination by a low power microscopy and hematoxylin and eosin staining confirmed that both diverticula were composed of all layers of the intestinal wall: mucosa, muscularis mucosa, and muscularis propria (a), which is characteristic of true diverticula. A thorough examination of sections through the base of the culprit diverticulum revealed the presence of cavernous spaces (stars) lined by endothelium, interspersed by loose connective tissue (arrowhead), but often communicating with each other (b,c), consistent with the presence of submucosal ArterioVenous malformation.
