Review of lymphoma in the duodenum: An update of diagnosis and management

Figure 3 Representative endoscopic and pathological images of duodenal follicular lymphoma (Case 3). A: Esophagogastroduodenoscopy shows thick, white mucosa in the descending portion of the duodenum; B: Magnifying observation reveals enlarged whitish villi; C: Magnifying observation with narrow band imaging emphasizes enlarged villi with elongated vasculature on the surface; D–J: Pathological images of the biopsied specimen. Hematoxylin and eosin stain shows medium-sized tumor cells that form follicular structures and diffusely invade into the villi (D: × 10, E: × 40). Lymphoma cells are positive for CD20, CD10, and BCL2, while negative for CD3. Tumor cells are sparsely positive for Ki67. HE: Hematoxylin and eosin.