Pelvic Girdle Showing The Anatomical Location Of The Iliac Crest, Medial View

Description

Iliac crest contours the superior margin of the ilium along the medial aspect of the pelvic girdle, arching from the posterior region toward the anterior superior iliac spine. Immediately inferior to the crest, the iliac fossa forms a broad concavity on the internal surface of the ala, bounded medially by the pelvic brim and arcuate line as they sweep anteroinferiorly toward the pubis. Posteriorly, the iliac tuberosity and auricular surface sit adjacent to the sacroiliac region, marking the transition from the thin iliac blade to the more robust articular and ligamentous attachments. Bony landmarks dominate the frame. The iliac crest matters because clinicians use it as a palpable surface landmark and as a frequent donor site for autologous bone graft, with the crest’s thickness and curvature guiding harvest orientation relative to the inner and outer tables. Medial surface context helps when teaching the iliacus origin within the iliac fossa and its continuity with the psoas major tendon, a relationship relevant to iliopsoas tendinopathy and to surgical approaches that mobilize the iliopsoas over the pelvic brim. This perspective also supports explanation of the intercristal (Tuffier) line concept used to estimate the L4 level for lumbar puncture, even though the needle entry occurs posteriorly. Use this illustration in gross anatomy and musculoskeletal anatomy courses to anchor pelvic brim orientation, iliac fossa topography, and sacroiliac region landmarks in a single medial reference. It also suits orthopedic and spine publications discussing iliac crest bone graft harvest, pelvic ring trauma descriptions, and radiology teaching figures that correlate internal iliac contours with CT reconstructions. Anatomical accuracy verified by SciePro's Medical Advisory Board.