• Masayuki Ishii, Atsushi Hamabe, Kenji Okita, Toshihiko Nishidate, Koichi Okuya, Akihiro Usui, Emi Akizuki, Tetsuta Satoyoshi, and Ichiro Takemasa.
• Department of Surgery, Surgical Oncology and Science, Sapporo Medical University, S1 W16, Chuo-ku, Sapporo, 060-8543, Japan. masayuki-ishii@sapmed.ac.jp.
• Int J Colorectal Dis. 2020 Feb 1; 35 (2): 269-275.

PurposeSome recent studies have suggested that fluorescence angiography with indocyanine green (ICG) might be useful for preventing anastomotic leakage (AL) after laparoscopic colorectal surgery. However, its efficacy has not been proven. We evaluated whether intraoperative ICG fluorescence angiography could decrease the AL rate with laparoscopic colorectal cancer surgery.MethodsThis retrospective study included patients with colorectal cancer who underwent laparoscopic surgery at our institution between March 2014 and December 2018. Patients were divided into two groups: with or without ICG fluorescence angiography. The primary outcome was the rate of AL.ResultsA total of 488 patients were included: 223 patients in the ICG group and 265 patients in the no-ICG group. In the ICG group, the transection line was changed to a more proximal location in seven patients (3.1%), including one patient with transverse colon surgery and six with rectal surgery. None of these seven patients developed AL. There were 18 ALs (3.7%) overall. The AL rate was 1.8% in the ICG group and 5.3% in the no-ICG group. For colon cancer, there were no significant differences in the AL rate between the groups (p = 0.278). In rectal cancer, the AL rate was significantly lower in the ICG group than in the no-ICG group (3.5% vs. 10.5%, p = 0.041). After propensity score matching, the AL rate was also significantly lower in the ICG group for rectal cancer (p = 0.044).ConclusionICG fluorescence angiography can potentially reduce the AL rate with laparoscopic rectal cancer surgery.

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