Department of Colorectal Surgery;
Japanese Red Cross Medical Center;
Tokyo 150-8935;
Japan;
Department of Gastroenterology;
International University of Health and Welfare;
Narita Hospital;
Narita 286-8520;
Japan;
Department of Gastroenterology;
Toyoshima Endoscopy Clinic;
Tokyo 157-0066;
Japan;
Department of Surgery;
The University of Kyorin;
Tokyo 113-8655;
Japan;
Department of Radiology;
Japanese Red Cross Medical Center;
Tokyo 150-8935;
Japan;
Tokyo Midtown Clinic;
Tokyo 107-6206;
Japan;
Miki Hospital;
Iwate 029-4201;
Japan;
Intersphincteric resection; Anastomotic leakage; Pelvimetry; Pelvic dimensions; Pelvic inlet plane area; Rectal cancer;