• Masaaki Miyo, Ichiro Takemasa, Hiroyuki Ishihara, Taishi Hata, Tsunekazu Mizushima, Yuko Ohno, Yuichiro Doki, and Masaki Mori.
• 1 Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Suita, Japan 2 Department of Surgery, Surgical Oncology and Science, Sapporo Medical University, Sapporo, Japan 3 Department of Mathematical Health Science, Osaka University Graduate School of Medicine, Suita, Japan.
• Dis. Colon Rectum. 2017 Jul 1; 60 (7): 664-673.

BackgroundComplete mesocolic excision has been suggested to improve oncological outcomes for patients with colon cancer. However, the long-term outcomes of single-site laparoscopic colectomy with complete mesocolic excision remain unclear.ObjectiveWe evaluated the long-term outcomes of single-site laparoscopic colectomy with complete mesocolic excision compared with conventional multiport laparoscopic colectomy for colon cancer, as well as the short-term outcomes.DesignThis is a single-center, retrospective study.SettingsThe study was conducted at Osaka University Hospital in Japan.PatientsA total of 971 consecutive patients who underwent laparoscopic surgery for colon cancer between 2008 and 2014 were included. Of these patients, 517 were analyzed using propensity score matching (231 with single-site laparoscopic colectomy and 286 with conventional multiport laparoscopic colectomy).Main Outcome MeasuresRecurrence, survival, intraoperative morbidity, and postoperative complications were analyzed.ResultsBefore propensity score matching, the single-site laparoscopic colectomy group had greater proportions of women and of patients with right-sided and early stage tumors compared with the conventional multiport laparoscopic colectomy group. After matching, the 2 groups each included 200 patients and did not significantly differ in any patient characteristics. The median follow-up period was 41.4 months. The 2 groups showed similar rates of intraoperative morbidity (p = 0.22) and postoperative complications (p = 0.87). Rates of 3-year disease-free and overall survival in single-site laparoscopic colectomy and conventional, multiport, laparoscopic colectomy groups were 95.5% and 91.3% (p = 0.44) and 100.0% and 98.7% (p = 0.24). The 3-year disease-free and overall survival rates in each stage did not significantly differ between the 2 groups.LimitationsThis study was limited by its retrospective nature.ConclusionsSingle-site laparoscopic colectomy with complete mesocolic excision for colon cancer provided acceptable perioperative outcomes and oncological outcomes, similar to those achieved with conventional multiport laparoscopic colectomy. Evidence accumulation from randomized controlled trials will be necessary to promote the wide acceptance of single-site laparoscopic colectomy. See Video Abstract at http://links.lww.com/DCR/A326.

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