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Photomicrograph Hematoxylin-Eosin (H&E) stain. Original magnification ×100 (A); and magnification ×400 (B,C)—with extensive infiltration by small atypical monomorphic lymphoid cells characteristics of MALToma, infiltrating up to mucosa, sub-mucosa and muscularis layer at periphery and immunohistochemical study illustrating the neoplastic cells wide spread positivity for tumor cells positive for CD20 (D). MALToma, mucosa-associated lymphoid tissue lymphoma.
