The cystic duct varies in length from two to four centimeters. In a normal condition of the duct it is impossible to carry the smallest probe through it, owing to its double curved course and the peculiar arrangement of its mucous lining. The terminal portion of the cystic duct, where it joins the hepatic duct to form the common bile duct, lies in front of the portal vein. The cystic artery lies above and behind the duct, and the portal vein behind it, at the junction of the cystic and hepatic ducts

Ductus cysticus

Conduit cystique