Out of 584 cases submitted to colorectal surgery 461 (78.92%) were performed for cancer. Thirty-three patients (7.16%) necessitated immediate (1) or precocious reinterventions for bleeding, fistulae, peritoneal infections, bowel occlusion, necrosis or stenosis of the iliac anus. We are out the technical procedures chosen for each class of complications asking for reintervention. We registered 4 deaths, in aged patients with hard associated morbidity, with emergency reinterventions. We appreciate that a correct preoperative preparation reduces the rate of reintervention and an early reintervention reduces the post-operative mortality.