title: Usefulness of preoperative CT colonography for colon cancer.
abstract: BACKGROUND
  Computed tomographic colonography (CTC) is reported to be feasible for screening of colorectal polyps; however, its efficacy in preoperative workup remains unknown. This study was done to define our CTC methodology and assess CTC's potential for preoperative examination in patients with colon cancer.
  
  
  METHODS
  A total of 86 colon cancer patients underwent CTC prior to laparoscopic colectomy in our department from February 2014 to November 2015. The location of primary colon cancer determined by CTC was compared with that confirmed during the surgery. CTC was performed just after preoperative colonoscopy; for a small colon cancer, we performed clipping during colonoscopy to enhance CTC detectability. We classified wall deformities and compared them with the pathological T stage.
  
  
  RESULTS
  CTC accurately located all 87 primary colon cancers prior to surgery. No patient experienced complications associated with CTC. The deformity classification correlated significantly with the pathological T stage (p < 0.001, Kruskal-Wallis nonparametric tests). CTC provided reconstructed images depicting the feeding artery of the primary colon cancer; feeding artery information obtained by CTC facilitated precise lymph node dissection.
  
  
  CONCLUSIONS
  CTC appears to be a feasible and useful preoperative examination modality for colon cancer treatment.
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan. Electronic address: kasatou-tky@umin.ac.jp.
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Sato
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Tanaka
authors.affiliation: Department of Radiology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Jiro
authors.initials: J
authors.lastname: Sato
authors.affiliation: Department of Radiology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Eisuke
authors.initials: E
authors.lastname: Shibata
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Yuzo
authors.initials: Y
authors.lastname: Nagai
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Murono
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Yasuda
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Kensuke
authors.initials: K
authors.lastname: Otani
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nishikawa
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Junichiro
authors.initials: J
authors.lastname: Tanaka
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Tomomichi
authors.initials: T
authors.lastname: Kiyomatsu
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Hata
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Kazushige
authors.initials: K
authors.lastname: Kawai
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Nozawa
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Kazama
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Yamaguchi
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Soichiro
authors.initials: S
authors.lastname: Ishihara
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Eiji
authors.initials: E
authors.lastname: Sunami
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Joji
authors.initials: J
authors.lastname: Kitayama
authors.affiliation: Department of Radiology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Kuni
authors.initials: K
authors.lastname: Ohtomo
authors.affiliation: Department of Surgical Oncology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Watanabe
mesh_terms: D000328:Adult; D000368:Aged; D015331:Cohort Studies; D003082:Colectomy / Q000379:methods*; D003111:Colonic Polyps / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000601:surgery; D023881:Colonography, Computed Tomographic / Q000379:methods*; D003113:Colonoscopy / Q000379:methods; D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery*; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007564:Japan; D010535:Laparoscopy / Q000379:methods; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care / Q000379:methods; D012042:Registries; D012189:Retrospective Studies; D018570:Risk Assessment; D016896:Treatment Outcome
keywords: colon cancer; colon cancer location; computed tomographic colonography; deformity; feeding artery