Posterior Geometric Delineation of the Main Portal Fissure of the Male Liver

Description

Posteriorly, the male liver is rendered with a geometric line marking the main portal fissure, the classic plane of Linea Cantlie (fissura portae principalis) that separates functional right and left hemilivers. The delineation runs in a right sagittal orientation from the gallbladder fossa on the inferior visceral surface toward the groove for the inferior vena cava on the posterior surface, tracking deep to the parenchyma rather than along an external fissure. Medially the plane approaches the hilar region, while laterally it aligns with the bulk of the right hepatic lobe. It is a surgical plane, not a surface landmark. That distinction matters in hepatic resection. Surgeons use the Cantlie line to plan right or left hepatectomy and to orient intraoperative ultrasound when the middle hepatic vein is used as the practical guide to the interlobar plane. The posterior perspective helps when teaching how the gallbladder bed and IVC groove anchor the functional division of the liver even when the falciform ligament misleads the eye, a common point of confusion in segmental (Couinaud) anatomy. Clear orientation prevents wrong-plane parenchymal transection. Use this artwork in hepatobiliary surgery texts, anatomy curricula covering functional liver anatomy, and radiology teaching files that correlate right sagittal planes with CT or MRI reconstructions during preoperative mapping for HCC, metastasectomy, or living donor evaluation. It also fits operative consent materials where the concept of functional lobes must be explained without overpromising surface landmarks. Anatomical accuracy verified by SciePro's Medical Advisory Board.