1) Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwa, Japan
2) Department of Surgery, Shonai Hospital, Tsuruoka, Japan
3) Department of Gynecology, Shonai Hospital, Tsuruoka, Japan
4) Department of Gynecology, National Cancer Center Hospital East, Kashiwa, Japan
5) Department of Surgery, Itoigawa General Hospital, Itoigawa, Japan

Yuichiro Tsukada¹⁾, Kaoru Sakamoto²⁾, Nobuyoshi Takeshita¹⁾, Satomi Suemori²⁾, Tetsuya Shimada²⁾, Ryo Yano³⁾, Shin Takenaka⁴⁾, Shigeaki Sawada⁵⁾, Masakazu Nagamori⁵⁾, Satoshi Suzuki²⁾, Masaaki Ito¹⁾