Prospective Multicenter Randomized Controlled Trial On Two-Stage Turnbull-Cutait Coloanal Anastomosis For Rectal

Inclusion Criteria: * Patients with adenocarcinoma of the lower-middle third of the rectum proctoscopy established by rigid proctoscopy, with histological confirmation and candidates of colo-anal anastomosis; * Patients over 18 years and under 75 years, who can tolerate neoadjuvant and surgical treatment; * Patients who undergo an ultra-low anterior rectal resection with total mesorectal excision and nerve and sphincter-sparing with curative intention * Any extension of the primary tumor (T 1-2-3-4) according to the TNM classification; * Patients with or without lymph node metastasis (N - / +) and with or without resectable distant metastases; * Patients clinically without fecal incontinence prior to the current illness and with a Wexner incontinence Score less than or equal to 5; * Patients ASA I, II or III and adequate hematological, renal and hepatic function; * Patients who signed informed consent. Exclusion Criteria: * Altered cognitive state(eg mental retardation or dementia) that prevents collaboration in the study or patients who can neither read nor write * Fecal incontinence (Wexner equal to or greater than 6); * Previous surgery or proctological, colonic and anorectal functional disease * Diagnosis of synchronous colorectal or any other active neoplasm; * Patients ASA IV, V; * Pregnancy and lactation; * Rejection of the patient to sign the consent form.