The digestive fistulas correspond to abnormal communications between the digestive system and between this and the body surface. Even after many years of study on the subject, digestive fistulas continue to challenge surgeons and patients suffering harm, consuming fortunes in their treatment, as well as causing serious damage affected people, its due to high morbidity and mortality. This review aims to review the literature on the gastrointestinal fistula subject, focusing on etiology, pathophysiology, classification, diagnosis, current therapy and prognosis in order to revisit a highly important topic and continue helping clinicians, general surgeons and device digestive in combating this challenge for doctors and patients.