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

Figure 3

20x magnification: (a) hematoxylin and eosin-stained section of the duodenum shows villous shortening/partial atrophy with increased subepithelial collagen deposition (pink). (b) Trichrome stain highlights the collagen blue. Arrows indicate entrapped capillaries.

(a)

(b)