The superior section of left interlobar fissure is the line from the left interlobar vein to the antero-left wall of IVC, and the left portal vein and the fissure of round ligament provide natural landmarks for the middle and inferior sections of the left interlobar fissure. 左叶间裂的上部为左叶间静脉至下腔静脉左前壁的连线,门静脉左支矢状部和肝圆韧带裂是其中、下部的天然标志;