“…Crohn`s disease and duodenal ulcers have been reported as the most common benign causes. Iatrogenic fistulas, penetrating injuries, foreign bodies and other inflammatory conditions, such as ulcerative colitis, colonic diverticulitis, radiation enteritis, and other abdominal infectious processes have also been described as causes of coloduodenal fistulae [1][2][3][4]. Malignant fistulae are usually secondary to colonic tumours, mainly those located at the hepatic flexure or the transverse colon [2].…”