Stepwise evaluation of liver sectors and liver segments by endoscopic ultrasound

Figure 15 Liver sectors and liver segments are visualized. A: The inferior vena cava (IVC) runs parallel to the probe in a long axis. A line along the right hepatic vein divides the liver into anterior and posterior sectors; B: The right lobe of the liver contains segments V to VIII. The segments are seen through the caudate process. The white line is drawn along the upper border of the curving part of the portal vein; C: The right hepatic vein is seen joining the IVC at an angle of around 60°. Segment VII is seen above the hepatic vein and segment VIII is seen between the hepatic vein and the IVC; D: The middle hepatic vein drains segment IV, segment V, and segment VIII. RHV: Right hepatic vein; LPV: Left branch of the portal vein; IVC: Inferior vena cava; PV: Portal vein.