title: Invasive micropapillary carcinoma of the ascending colon--a report of a case.
abstract: Micropapillary carcinoma (MC) has been recently recognized to be a rare but distinctive variant of adenocarcinoma. At present, only a limited number of colorectal MC cases have been reported. We present a case of MC of the ascending colon with distant metastasis. A 61-year-old female patient was hospitalized with a complaint of abdominal pain. A diagnostic work-up revealed cancer of the ascending colon with multiple lung metastases. The patient underwent a right hemicolectomy with lymph node dissection. A peritoneal nodule was observed in the abdominal cavity during surgery, and this nodule was also resected. The pathologic findings of the colon tumor revealed components of conventional tubular adenocarcinoma and micropapillary carcinoma. Lymph nodes and a peritoneal nodule revealed tubular adenocarcinoma. MC is a rare disease but has high malignant potential. In the present case the tumor was small in size, but the patient had a peritoneal and multiple lung metastases.
authors.affiliation: Department of Surgery, Teikyo University School of Medicine, Tokyo, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Shibuya
authors.forename: Keiji
authors.initials: K
authors.lastname: Matsuda
authors.forename: Ryu
authors.initials: R
authors.lastname: Shimada
authors.forename: Atsushi
authors.initials: A
authors.lastname: Horiuchi
authors.forename: Hisae
authors.initials: H
authors.lastname: Iinuma
authors.forename: Tamuro
authors.initials: T
authors.lastname: Hayama
authors.forename: Hideki
authors.initials: H
authors.lastname: Yamada
authors.forename: Keijiro
authors.initials: K
authors.lastname: Nozawa
authors.forename: Soichiro
authors.initials: S
authors.lastname: Ishihara
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Watanabe
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D003082:Colectomy; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D003113:Colonoscopy; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000556:secondary; D008207:Lymphatic Metastasis; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D014057:Tomography, X-Ray Computed