Detailed Ventral Access Point to the Main Portal Fissure of the Male Liver

Description

Anterior orientation of the adult male liver highlights the main portal fissure (Fissura portalis principalis) as a deep cleft on the visceral surface, running obliquely between the right and left functional lobes. Superior to this access point lies the inferior margin of the diaphragmatic (anterior) surface, while inferior and posterior you would expect the porta hepatis region where the portal vein, proper hepatic artery, and hepatic ducts enter or exit. Medially the fissure aligns toward the umbilical portion of the left portal vein and the fissure for the ligamentum teres hepatis, while laterally it relates to the right portal pedicle coursing toward segments V to VIII. Mapping the main portal fissure matters because it approximates Cantlie’s line, the plane used to separate the liver into right and left hemilivers for functional anatomy and resection planning. Surgeons follow this plane during right or left hepatectomy to stay between portal pedicles and hepatic venous drainage territories, and interventional radiologists use the same segmental logic when selecting portal venous branches for embolization before major resection. A clean ventral access depiction also helps clarify why the “anatomic” lobes seen on the surface do not match the functional division driven by portal inflow. Use this artwork in hepatobiliary surgery teaching (Couinaud segmentation, hilar dissection, and inflow control), in radiology atlases that correlate surface landmarks with portal triad anatomy, or in medical publishing where concise labeling of the main portal fissure prevents left-right functional lobe confusion. Anatomical accuracy verified by SciePro's Medical Advisory Board.