Panel A shows normal liver anatomy, with segments II through VIII shown. Segment I, which lies posteriorly, next to the vena cava, is not shown. The portal vein is shown, with the right portal ...

The liver has two main portions or lobes. Each lobe is further divided into eight segments. Each segment has an estimated 1,000 lobules or small lobes. Each of these lobules has a small tube (duct ...

Couinaud et al (1957) in France first described the segmental anatomy of the liver, which is essential to modern liver surgery. In essence the liver has four sectors and eight segments (Figure 1).