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Hematoxylin and eosin stain (H&E) of rectal mass-like lesion in a patient with HIV. a. Ulcerated rectal mucosa with mass-like submucosal exuberant inflammatory infiltrate. b. Dense lymphoplasmacytic inflammation in submucosa. c. Rich eosinophilic infiltrate with single or multi-nucleated viral inclusions in endothelial cells. d. High power view of endothelial multi-nucleated inclusions. Original magnifications: a, 20X; b-d, 400X
