Advanced Left Lobe of the Liver Quiz

Q1. Which operation removes segments II and III while preserving segment IV?

• Right hepatectomy
• Left lateral sectionectomy
• Cholecystectomy
• Caudate lobectomy

Q2. What generally distinguishes a formal left hepatectomy from a left lateral sectionectomy?

• Left hepatectomy removes only segment I
• The procedures are anatomically identical
• Left lateral sectionectomy removes segments V-VIII
• Left hepatectomy includes segment IV in addition to segments II and III

Q3. Why is the middle hepatic vein important when defining the functional right-left hepatic plane?

• It approximates the principal functional plane between right and left portal territories
• It forms the left hepatic duct
• It drains only segment I
• It lies within the falciform ligament

Q4. Why can an aberrant right posterior sectoral duct be relevant during surgery on the left liver?

• It carries portal venous blood
• It drains segment II only
• It always enters the gallbladder fundus
• It may enter the left hepatic duct and place right posterior drainage at risk

Q5. How does the umbilical portion of the left portal vein relate to left-sided segmental supply?

• It supplies only the caudate lobe
• It is part of the common bile duct
• It drains directly into the inferior vena cava
• It distributes portal branches to segments II, III, and IV

Q6. Why is a replaced left hepatic artery from the left gastric artery important during upper abdominal surgery?

• It runs through the cystic duct
• It is always a harmless venous channel
• It supplies only the right kidney
• It can course through the lesser omentum and be vulnerable during gastric or hilar surgery

Q7. What embryologic event contributes to the broad left-right arrangement of the adult liver?

• Closure of the neural tube
• Rotation of the hindgut alone
• Fusion of the ureteric buds
• Growth of the hepatic diverticulum into the ventral mesentery with developing vascular branching

Q8. Why can the left lobe extend across the midline despite being termed the left lobe?

• The liver has no anatomical landmarks
• External hepatic lobes are defined by liver landmarks rather than the body midline
• The left lobe is part of the spleen
• The left lobe is located entirely in the pelvis

Q9. How does biliary anatomy support the concept of a functional left liver?

• Segment IV drains only through the right ureter
• Left-sided segmental ducts converge according to functional portal territories
• All left liver bile drains through the cystic duct
• Bile ducts follow the falciform ligament exclusively

Q10. Which statement best integrates the anatomy of the left lobe of the liver?

• It consists only of segment II and has no arterial supply
• It drains bile directly into the gallbladder
• It is defined functionally by the falciform ligament alone
• It combines segmental portal, arterial, biliary, and venous anatomy that differs from the external anatomical lobe boundary