Abstract
More than 190 cases of juvenile polyp were reported in Japan, in which only two cases were found in the ascending colon. Therefore, this is thought to be the 3rd report of ascending colon polyp in Japanese literature. A 10-year-old girl was refered to us for further evaluation of bloody stool. Barium enema showed a pedunculated polyp (IV-type of Yamada and Fukutomi's classification) with a slightly uneven surface which revealed a two-headed polyp with partial hemorrhage by colonoscopic examination. The specimen obtained by colonoscopic polypectomy was elastic firm and had two heads, 2.2×1.4 cm and 1.6×1.0 cm in size, respectively. The cut-surface showed small multiple cystic lesions. Histological study revealed cystic formation with dilated glands and interstitial edema, which finding was compatible with juvenile polyp. This case was considered to be unique because of abundant eosinophilic infiltrations, which may be related to the etiology of this disease.
