ABSTRACT
Biliary anatomy is highly variable. The extrahepatic anatomy i.e., Rouviere’s sulcus, hepatocystic triangle, cystic duct and artery must be identified clearly when performing a laparoscopic cholecystectomy. Rouviere’s sulcus has been classified into four types based on its appearance during cholecystectomy. The cystic artery commonly arises from right hepatic artery, but may have a different source of origin that determines its course in the hepatocystic triangle. The cystic duct can have variations with respect to size, course and insertion into the common bile duct. This chapter presents both the normal structures, as well as variations, of these anatomical structures and landmarks.
