Anatomy Wisdom, part 2

Question 0

Which anatomic landmark divides the median and lateral segments of the left lobe of the liver?

Answer 0

The FALCIFORM LIGAMENT marks the segmental fissure between the median and lateral segments of the left lobe.

Question 1

How is the segmented anatomy of the liver determined?

Answer 1

By the vascular supply and the biliary tree.

Question 2

What is the name of the invisible line that divides the left and right lobes of the liver?

Answer 2

Interlobar fissure

Question 3

Splanchnic circulation refers to…

Answer 3

All the structures that receive blood from the celiac artery, the SMA, and the IMA.

The portal vein drains the entire splanchnic circulation.

Question 4

What three structures are found in the porta hepatis, and what are their relative locations?

Answer 4

• The common hepatic artery is anteromedial (medial to the bile duct). It gives off the gastroduodenal artery
• The bile duct lies anterolaterally in the porta hepatis.
• The portal vein lies posteriorly in the porta hepatis.

Question 5

Wedge resections of small lesions near the surface of the liver ar possible and do not require a full lobectomy. Large resections of the liver, however, must rely on segmental anatomy for reasons of vascular and biliary supply. Name some large resections:

Answer 5

Right hepatic lobectomy
Left hepatic lobectomy
Trisegmentectomy
Left lateral segmentectomy