Due to the improvement of surgical techniques, the number of total pelvic evisceration surgeries is increasing annually. However, the number of postoperative complications remains high and varies between 31.2 and 45.1%. A common complication is the formation of a small intestine fistula. Further postoperative management of patients with the presence of a small intestine fistula is not an easy task. The mortality rate for this complication after total pelvic evisceration reaches 34.4%. The paper presents a clinical case of a patient with an external incomplete unformed small intestine fistula that emerged after performing total infralevatory pelvic evisceration due to local advanced rectal cancer. The article gives a review of the literature data on the problem and a clinical example of the occurrence of complications. The authors provide a detailed description of the patient's medical history. The causes of the fistula and further treatment of the patient, aimed at eliminating the small bowel fistula, are given.
