Relations of bile duct are :-i) Supraduodenal part (above first part of duodenum) :- This part lies in the free margins of lesser omentum. Its relations are :Anterior → Liver Posterior → Portal vein and epiploic foramen Left side → Hepatic arteryii) Retro-duodenal part (Behind first part of duodenum) :- Its relations are :Anterior → 1st part of duodenum Posterior → IVC Left side → Gastroduodenal arteryiii) Infraduodenal part (Below first part of duodenum) :- Its relations are :Anterior → Head of pancreas Posterior → IVC