Carcinoma in gut-associated lymphoid tissue in ulcerative colitis: Case report and review of literature

Figure 1 Endoscopic image showing a polypoid lesion in the transverse colon.

Figure 2 Low-power view. A: A villous adenoma on top of a gut-associated lymphoid tissue (GALT) with carcinoma [hematoxylin and eosin (HE) × 4]; B: Detail showing carcinoma in GALT (HE × 10); C: A villous adenoma on top of a GALT with carcinoma (MNF 116 × 4).

Figure 3 High-power view. A: The villous adenoma showing high cell proliferation (Ki67, clone MIB1 × 10); B: Gut-associated lymphoid tissue with carcinoma showing lower cell proliferation than in the villous adenoma on top (Ki67, clone MIB1 × 20).