title: Case of adenosquamous carcinoma of the ascending colon.
abstract: Adenocarcinoma accounts for most of the malignant tumors originating from the colon, whereas adenosquamous carcinoma is rare, accounting for about 0.1% of all colon cancers. We present herein a case of adenosquamous carcinoma of the ascending colon. The patient was a 94-year-old woman who presented with a chief complaint of lower abdominal pain. A barium enema examination and lower gastrointestinal endoscopy showed a type 3 tumor in the ascending colon, and a biopsy confirmed the diagnosis of adenosquamous carcinoma. Right hemicolectomy was performed, and the tumor was diagnosed as a stage III advanced colon cancer. The patient had postoperative aspiration pneumonia and died 35 days after surgery. A search of Japanese literature over the past 25 years yielded 70 patients with adenosquamous carcinoma of the colon, and the clinicopathological features are discussed herein.
authors.affiliation: Surgery for Organ Function and Biological Regulation, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan. kimiyoko@nms.ac.jp
authors.forename: Kimiyoshi
authors.initials: K
authors.lastname: Yokoi
authors.forename: Noritake
authors.initials: N
authors.lastname: Tanaka
authors.forename: Kiyonori
authors.initials: K
authors.lastname: Furukawa
authors.forename: Tomoko
authors.initials: T
authors.lastname: Seya
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Ohaki
authors.forename: Takashi
authors.initials: T
authors.lastname: Tajiri
mesh_terms: D000369:Aged, 80 and over; D018196:Carcinoma, Adenosquamous / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003082:Colectomy; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003113:Colonoscopy; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D009367:Neoplasm Staging; D011015:Pneumonia, Aspiration; D011183:Postoperative Complications