title: Giant mucocele of the colon at the distal stump due to low-grade mucinous neoplasia.
abstract: We present the first ever report on a colonic mucocele observed at the distal stump of a transverse loop colostomy caused by neoplasia. A 37-year-old female consulted us because of abdominal pain and vomiting caused by cystic lesions in the upper left abdominal quadrant. A preoperative checkup revealed no sign of neoplastic lesions; however, tumor resection was performed because of the symptoms. The tumor was a mucocele of the distal stump of the transverse colon with obstruction interposed between the mucocele and stoma. Pathological diagnosis was low-grade adenoma; however, it appeared like low-grade mucinous neoplasia of the appendix rather than a normal colonic adenoma. The neoplasia existed in the transitional segment between obstruction and dilatation. As this is the first case of colonic mucocele caused by mucinous neoplasia, no definite consensus for diagnosis and treatment exists. With reference to low-grade mucinous neoplasia, we propose that complete surgical resection be performed for diagnosis and a favorable outcome.
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan. toshi-t@venus.dti.ne.jp.
authors: Toshiaki
authors: T
authors: Tanaka
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Kazushige
authors: K
authors: Kawai
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.|Department of Pathology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Hiroyuki
authors: H
authors: Abe
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Koji
authors: K
authors: Murono
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Kensuke
authors: K
authors: Otani
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Takeshi
authors: T
authors: Nishikawa
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Tomomichi
authors: T
authors: Kiyomatsu
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Keisuke
authors: K
authors: Hata
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Hiroaki
authors: H
authors: Nozawa
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Hironori
authors: H
authors: Yamaguchi
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Soichiro
authors: S
authors: Ishihara
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.|Department of Pathology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Masashi
authors: M
authors: Fukayama
authors: Department of Surgical Oncology, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan.
authors: Toshiaki
authors: T
authors: Watanabe
keywords: Colonic mucocele; Low-grade mucinous neoplasia