Sacrum as, Lateral View

Description

Left lateral anatomy of the male sacrum is presented with the promontory and base superiorly, tapering inferiorly toward the apex where it meets the coccyx. The anterior (pelvic) surface lies concave, while the posterior surface is convex with the median sacral crest tracking dorsally, and the auricular surface occupies the superolateral margin for articulation with the ilium. The superior articular process and remnant of the sacral canal sit posterior to the body. Clear landmarks. Clinically, a true lateral perspective helps clarify the sacral promontory as an obstetric landmark and shows how the sacral curvature contributes to pelvic inlet and outlet dimensions, information often lost in purely anterior or posterior diagrams. This angle also supports teaching around caudal epidural anesthesia, where needle trajectory relates to the sacral hiatus and the posterior sacral anatomy (cornua and canal) rather than the pelvic surface. Fracture patterns and implant planning benefit from understanding the thickness gradients from ala to body. It matters in the OR. Use this illustration in pelvic anatomy and musculoskeletal courses when teaching sacroiliac joint orientation, sacral kyphosis, and the sacrococcygeal junction, and in anesthesia or pain medicine materials covering caudal blocks and sacral hiatus palpation. It also fits obstetrics and gynecology content discussing the promontory and pelvic measurements in relation to labor mechanics. Anatomical accuracy verified by SciePro's Medical Advisory Board.