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

Figure 5 Representative endoscopic and pathological images of duodenal MALT lymphoma (Cases 8 and 9). A: Case 8. A protruded lesion mimicking hypertrophic folds is observed in the duodenum; B: Case 9. Esophagogastroduodenoscopy shows ulcerative tumor in the duodenum; C–H: Pathological images of Case 9. On hematoxylin and eosin stain, small to medium-sized lymphoma cells are predominant (C: × 10, D: × 40). Neoplastic cells are positive for CD20, while negative for CD3, CD5, and Cyclin D1. HE: Hematoxylin and eosin.