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Fig. 3 | Diagnostic Pathology

Fig. 3

From: Multiple lesions of gastrointestinal tract invasion by monomorphic epitheliotropic intestinal T-cell lymphoma, accompanied by duodenal and intestinal enteropathy-like lesions and microscopic lymphocytic proctocolitis: a case series

Fig. 3

Patient 2 (ad). a: Two circumferentially ulcerated tumors are evident on gross examination of the resected jejunum. Thickening of Kerckring’s folds and granular changes in the mucosal surface are seen in the mucosa surrounding the tumor. b: Histological findings of the jejunum include a diffuse infiltrate of medium-sized atypical lymphocytes with round nuclei in the crypt epithelium and lamina propria of the peripheral zone of the jejunal tumor. c: Increased small IELs are present in the ascending colon (c); the CD8 positivity of the IELs (d) is indicative of lymphocytic colitis. (b, c: H&E stain, d: immunohistochemistry, hematoxylin stain)

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