直肠癌是常见的消化道恶性肿瘤之一。自1982年全直肠系膜切除被引入直肠癌手术治疗并广泛开展.直肠癌的5年生存率已经从45%~50%上升到75%.局部复发率从30%下降到5%~8%.中-低位直肠癌保肛率也已经上升了至少20%。性功能障碍.尤其是勃起功能障碍.是男性直肠癌治疗术后最常见的并发症之一.其发病率为40%~60%。1983年日本的土屋周二提出“盆腔自主神经保护”的手 Rectal cancer is one of the most common gastrointestinal malignancies. Total mesorectal excision has been introduced into rectal cancer surgery since 1982 and has been extensively performed. The 5-year survival rate of rectal cancer has risen from 45% to 50% to 75%, and the local recurrence rate has dropped from 30% to 5% to 8%. Mid-lower rectal cancer anal rate has also risen by at least 20%. Sexual dysfunction, especially erectile dysfunction, is one of the most common complication after male rectal cancer treatment.The incidence rate is 40% ~ 60%. In 1983 Japan’s Tsuchiya proposed “pelvic autonomic nerve protection” hand on Tuesday