Relations of duodenum Relations of superior part ◆ Anteriorly Quadrate lobe of liver Gallbladder ◆ Posteriorly ◆ Common bile duct ◆ Gastroduodenal a ◆ Hepatic portal v ◆ Inferior vena cava ◆ Superiorly ● Omenta| foramen ◆ Inferiorly ● Head of pancreasRelations of duodenum Relations of superior part  Anteriorly  Quadrate lobe of liver  Gallbladder  Posteriorly Common bile duct Gastroduodenal a. Hepatic portal v. Inferior vena cava  Superiorly  Omental foramen  Inferiorly  Head of pancreas