Acute Gastrointestinal Bleeding in Olmesartan-Associated Collagenous Gastroduodenitis: A Potential Endoscopic Complication

Figure 2

20x magnification: (a) hematoxylin and eosin-stained section of the gastric body shows a thick, markedly irregular pink band of subepithelial collagen deposition with complete surface erosion. The mucosa is inflamed and atrophic with loss of parietal cells. Arrows indicate entrapped capillaries. (b) Trichrome stain highlights the collagen blue.

(a)

(b)