Cholecystocolonic fistula: A rare presentation of colon adenocarcinomaMojtaba Niknami 1*, Amirhosein Kabiri 1, Rasoul Ebrahimi 1, Iman Razeghian 11 School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran*Correspondence to: Dr. Mojtaba Niknami, Assisstant professor of general surgery, Shahid Beheshti University of Medical Sciences, Tehran, IranE-mail: dr.niknami2019@gmail.com