Two Cases of Benign Lymphoid Polyps of the Large Intestine

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  • 大腸良性リンパ濾胞性ポリープの2例

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Benign lymphoid polyp of the rectum is an uncommon lesion. About 20 cases have been reported in Japan to date, and the same type of polyp of the transverse colon is also unusual. Only one case has so far been reported.<br> Case 1 : The immunological fecal occult blood test of a 50-year-old woman revealed a positive diagnosis. Colonoscopy disclosed 5-6 hemispheric polyps measuring 2-4mm near the anal verge. The polyps had disappered 6 months later. Histological examination of the specimens showed lymphoid hyperplasia with numerous lymphocyte infiltrations in the submucosa. No atypical lymphocytes were found.<br> Case 2 : A 65-year-old woman was admitted to our clinic complaining of right upper quadrant discomfort. Barium enema examination revealed a small polypoid lesion in the transverse colon near the hepatic flexure. Endoscopic polypectomy was performed, and the specimen was 6×8mm in size. Histological examination showed lymphoid follicular hyperplasia with germinal centers. Immunohistological staining did not show any monoclonality in the lymphocytes.

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