直肠癌是乙状结肠-直肠交界处至齿状线之间的癌,是消化道常见的恶性肿瘤,占消化道癌的第二位。目前,全球直肠癌的发病率和死亡率仍呈上升趋势,许多国家把其作为重点进行研究。随着对直肠解剖、肿瘤行为及病理的认识和生活质量的高要求,对医疗器械设备的研制和开发,对手术技巧和 Rectal cancer is a sigmoid colon - rectal junction to the dentate line between the cancer, is a common malignant tumor of the digestive tract, accounting for the second of gastrointestinal cancer. At present, the incidence and mortality rate of rectal cancer in the world are still on the rise, and many countries regard it as the key research. With the rectal anatomy, tumor behavior and pathological understanding and quality of life of high demand, the development of medical equipment and equipment, surgical techniques and