Inferior Aspect of the Anterior Lateral Liver Segment in a Male

Description

Seen from below, the anterior part of the left lateral hepatic sector (segment III in Couinaud classification) occupies the left side of the field, with its visceral (inferior) surface facing the viewer and its thin inferior margin running anteriorly. Medially, segment III approaches the plane of the falciform ligament that separates it from segment IV, while laterally it tapers toward the left hepatic edge and the diaphragmatic surface. Posteriorly, the visceral surface sweeps toward the porta hepatis region, where the left portal pedicle would enter deeper within the parenchyma. Segmental geography matters. Couinaud segment III is a common reference point for left lateral sectionectomy and for planning limited wedge resections when lesions sit near the inferior margin of the left lobe. From an inferior perspective, you can teach the difference between surface impressions and true segmental borders, since the ligamentum teres and fissure landmarks on the visceral surface help orient the surgeon but do not always match portal territory precisely. This angle also supports discussions of segment III tumors abutting the left hepatic vein territory and the risk of bile duct injury when transecting too medially toward segment IV. Use this illustration to anchor hepatobiliary anatomy lectures, liver segmentation chapters in operative atlases, or preoperative planning handouts for laparoscopic left lateral segment resection in adult male patients. It also fits radiology teaching where axial and coronal CT or MRI segment mapping is cross-checked against the visceral surface landmarks of the left lobe. Anatomical accuracy verified by SciePro's Medical Advisory Board.