Abstract
Total of 254 cases of biliary tract disease have been subjected to endoscopic cholangiography. In total of 146 cases of cholelithiasis endoscopic cholangiography was successfully accomplished in 120 cases i. e. success rate of 82 per cent. Choledochal and intrahepatic stones were visualized in 84 and 100 per cent respectively. In the course of the investigation 25 cases of parapapillary choledochoduodenal fistula were diagnosed which have hitherto been missed by the routine examination. The fistulas were classified into two groups i. e. Type I small fistula originating from intramural bile duct and Type II larger fistula originating from the distal portion of extramural common bile duct. Type I fistula is probably produced by the smaller stone which was lodged into the intram-ural portion of common bile duct while Type II fistula is the result of the larger stone which can not be passed into intramural portion of the duct and hence impacted into the distal portion of the extra-mural common bile duct.
