Complications of colorectal diseases management that involve resections and anastomosis are not rare; they are frequently severe. With morbid variable extensions, they extend the period of hospital, considerablyincrease the treatment cost, perpetuate functional sequels, and contribute to undesirable high rate mortality. The most frightening complication is the anastomosis dehiscence, whose definition, incidence, etiology, and factors of risks are targets of controversial opinions, causing difficulty to prepare preventive universal schemes. The most severe consequence of the anastomosis leakage is the generalized peritonitis, culminating in the sepsis that is the primary cause of surgically related mortality. The least and less frequent complications are the anastomotic hemorrhage, stenosis, and fistula. The anastomotic hemorrhage, fistula and stenosis most times, can be treated as a nonsurgical form. This manuscript was intended by to provide a general view of these complications, their causes, evolutions, diagnoses, and treatments.
anastomosis,surgical; anastomotic leak; gastrointestinal hemorrhage; intestinal fistula