title: Single-incision laparoscopic surgery using colon-lifting technique for colorectal cancer: a matched case-control comparison with standard multiport laparoscopic surgery in terms of short-term results and access instrument cost.
abstract: BACKGROUND
  Single-incision laparoscopic surgery (SILS) has been used for colorectal cancer as a minimally invasive procedure. However, there are still difficulties concerning effective triangulation and countertraction. The study's purpose was to clarify the usefulness of the colon-lifting technique (CLT) in SILS for colorectal cancer.
  
  
  METHODS
  SILS was performed for cancer (cT2N0 or less) of the right-sided colon (near the ileocecum), sigmoid, or rectosigmoid. The SILS™ Port was used for transumbilical access. A suture string was inserted through the abdominal wall and passed through the mesocolon. The colon was retracted anteriorly and fixed to the abdominal wall. The main mesenteric vessels were placed under tension. Lymph node dissection was performed by medial approach. Short-term surgical outcomes and access port costs were compared between SILS (using CLT) and the standard multiport technique (MPT). The two groups were case-matched by propensity scoring. Analyzed variables included preoperative Dukes stage and tumor location.
  
  
  RESULTS
  From June 2009 to April 2011, 27 patients underwent SILS, and from April 2005 to April 2011, 85 patients underwent MPT. Propensity scoring generated 23 matched patients per group for SILS versus MPT comparisons. There were no significant differences in operating time, blood loss, early complications, postoperative analgesic frequency, or length of hospital stay. One MPT patient was converted to open surgery (4.5%); no SILS patients were converted. There were no significant differences in the length of distal cut margin and the number of harvested lymph nodes, except incision length (SILS vs. MPT: 33 vs. 55 mm, P < 0.001). Significant differences favored SILS in access instrument cost (SILS vs. MPT: 62,761 vs. 77,130 Japanese yen, P < 0.001).
  
  
  CONCLUSIONS
  SILS performed using CLT was safe and effective in providing radical treatment of cT2N0 cancer in the right-sided colon, sigmoid, or rectosigmoid. SILS was advantageous with respect to cosmesis and lower cost of access instruments.
authors.affiliation: Department of Surgery, Gastroenterological Center, Yokohama City University, 4-57 Urafunecho, Minami-ku, Yokohama, 232-0024, Japan. u0970047@urahp.yokohama-cu.ac.jp
authors.forename: Shoichi
authors.initials: S
authors.lastname: Fujii
authors.forename: Kazuteru
authors.initials: K
authors.lastname: Watanabe
authors.forename: Mitsuyoshi
authors.initials: M
authors.lastname: Ota
authors.forename: Jun
authors.initials: J
authors.lastname: Watanabe
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Ichikawa
authors.forename: Shigeru
authors.initials: S
authors.lastname: Yamagishi
authors.forename: Kenji
authors.initials: K
authors.lastname: Tatsumi
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Suwa
authors.forename: Chikara
authors.initials: C
authors.lastname: Kunisaki
authors.forename: Masataka
authors.initials: M
authors.lastname: Taguri
authors.forename: Satoshi
authors.initials: S
authors.lastname: Morita
authors.forename: Itaru
authors.initials: I
authors.lastname: Endo
mesh_terms: D000368:Aged; D016063:Blood Loss, Surgical / Q000706:statistics & numerical data; D016022:Case-Control Studies; D015179:Colorectal Neoplasms / Q000191:economics / Q000601:surgery*; D003365:Costs and Cost Analysis; D005260:Female; D006801:Humans; D010535:Laparoscopy / Q000191:economics / Q000379:methods*; D007902:Length of Stay / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D057216:Propensity Score; D016896:Treatment Outcome
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