A CASE OF BENIGN LYMPHOID POLYP IN THE RECTUM

Abstract

A 62-year-old women was admitted to our hospital complaining with anal bleeding. On digital examination a nodular protruded lesion was palpated. On barium enema, a nodular protruded lesion was recognized in the rectum. On endoscopical examination, a semipedunculated reddish protruded lesion was observed in the rectum. The surface of the lesion was nodular and eroded at the top of the lesion. On histological examination of the biopsied specimen obtained from the lesion endoscopically, lymphoid infiltrate with lymphoid f ollicules containing germinal center was observed under the colonic epithelium. So the lesion was diagnosed as benign lymphoid polyp endoscopically. Surgical polypectomy was performed. The specimen was 3.2×2.7×1.2 cm in size. On histological examination, the lesion was composed of lymphoid infiltrate with numerous lymphoid follicules containing germinal centers under the colonic epithelium and defect of the epithelium was observed at the top of the lesion. Only 11 cases of benign lymphoid polyp of the colon, including our case, have been reported so far in Japan.