Duodenal mucosa showing almost diffuse villous atrophy as the intestinal villi are significantly shrunken or partially flattened (moderate 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.
Atrophic duodenopathy.
Soft tissue fragments collectively measured 0.9 cm, totally embedded.
Duodenum, endoscopic biopsy: