Abstract
3μL. Colonoscopy showed colonic diverticulosis and multiple polypoid tumors (< 10 mm) with submucosal aspect, hyperemia in the central zone and some of them bled easily on touch. Similar lesions, but bigger (1215 mm), were found by ileoscopy (Fig. 1) and multiple biopsies were taken. Computed tomographic scan did not reveal either pathologic lymph nodes or other disorders. Histologically, an atypical lymphoid proliferation in the submucosa was seen. The lymphoma cells were positive for CD20, CD 5, and cyclin D1 and high Ki-67 proliferative index (Fig. 2). A final diagnosis of mantle cell lymphoma (MCL) was made. Pathologic study of the bone marrow was normal and the bone marrow myelogram showed mature lymph nodes suggesting infiltration of non-Hodgkin lymphoma.
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