RT Book, Section A1 Ellison, E. Christopher A1 Zollinger, Robert M. SR Print(0) ID 1127273399 T1 ANATOMY AND RESECTIONS OF THE LIVER T2 Zollinger's Atlas of Surgical Operations, 10e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 978-0-07-179755-9 LK accesssurgery.mhmedical.com/content.aspx?aid=1127273399 RD 2024/03/28 AB The liver is divided into eight major subsegments or sectors (including the caudate lobe), with the principal line (Cantlie’s line) of division between the right and left sides extending cephalad and obliquely from the middle of the gallbladder fossa to the center of the inferior vena cava between the right and left main hepatic veins (figure 1, a–a′). The true anatomic left lobe thus defined is divided into medial (segment IV) and lateral segments (segments II and III) approximately along the line of the falciform or round ligament, and each of these segments is then subdivided into a superior (cephalad, II) area and an inferior (caudad, III) sector (figure 2). In contrast, the right lobe (segments V–VIII) is divided into anterior and posterior segments by a plane from the anteroinferior edge of the liver that extends both superiorly and posteriorly. This cleavage is similar to the oblique fissure above the right lower lobe of the lung, and it is roughly parallel to it. These segments of the right hepatic lobe are then split into superior (segments VII and VIII) and inferior (segments V and VI) areas similar to those on the left (figure 2).