Focally ulcerated duodenal mucosa showing almost diffuse villous atrophy as the intestinal villi are significantly shrunken or partially flattened (moderate/marked atrophy). The crypts (glands at the base of the villi) become deeper as the body tries to compensate for lost villi. There is a pathological increase in these lymphocytes within the epithelial lining. No evidence of specific granulomas. No evidence of atypia or malignancy.
Hematemesis. Endoscopy: mild atrophic changes and fissuring of the duodenal mucosa.
Soft tissue fragments collectively measured 0.5 cm, totally embedded.
Duodenum, Biopsy: