Intermediate Left Hepatic Duct Quiz

Q1. Which Couinaud segments are classically associated with drainage into the left hepatic ductal system?

• Segments II, III, and IV
• Segment I only
• Segments V, VI, VII, and VIII only
• Segments VI and VII only

Q2. How is the left hepatic duct commonly formed within the liver?

• By union of the cystic and pancreatic ducts
• By division of the common bile duct
• By convergence of left lateral and left medial biliary drainage
• By fusion of hepatic veins

Q3. How does the typical left hepatic duct compare with the right hepatic duct in extrahepatic length near the hilum?

• It often has a longer hilar course
• It is always absent
• It is always much shorter and entirely intrapancreatic
• It always enters the gallbladder directly

Q4. What is the relationship between the left hepatic duct and the left portal vein in the hilar region?

• The duct is posterior to the inferior vena cava throughout
• The duct is closely related to and generally anterior to portal venous structures
• The duct has no relationship to portal structures
• The duct lies within the portal vein lumen

Q5. Why is the right-left hepatic duct confluence important in left hepatic duct anatomy?

• It is the origin of the cystic artery
• It is where the pancreatic duct begins
• It marks the renal hilum
• It marks the usual junction where the common hepatic duct begins

Q6. Can the left hepatic duct receive drainage from part of the right liver?

• Yes, variant right sectoral ducts may drain into it
• No, this never occurs
• Only hepatic veins can cross functional territories
• Only the cystic duct can join it

Q7. Why are left hepatic duct variants important before liver surgery?

• They can alter which liver territories depend on a particular ductal branch
• They eliminate hepatic arterial flow
• They cause the portal vein to become a bile duct
• They change the liver into a retroperitoneal organ

Q8. Which imaging concept is especially useful for defining left hepatic duct branching before complex hepatobiliary surgery?

• Mapping the biliary branching pattern with cholangiographic imaging
• Assessing the urinary bladder alone
• Measuring only renal cortical thickness
• Imaging only the splenic artery

Q9. What happens upstream when the left hepatic duct is obstructed proximal to the main hepatic duct confluence?

• The right renal pelvis dilates
• The pancreatic tail fills with bile normally
• Left-sided intrahepatic ducts may dilate
• The inferior vena cava becomes obstructed by definition

Q10. Which statement best describes segment IV biliary drainage?

• It has no bile ducts
• It always drains directly into the cystic duct
• It generally contributes to the left hepatic ductal system
• It always drains exclusively into the right posterior sectoral duct