Fractured Ilium, Posterior View

Description

Posterior anatomy of the male bony pelvis is rendered with the left ilium highlighted at the site of fracture near the sacroiliac junction, where the auricular surface of the ilium abuts the lateral sacrum. Superiorly, the iliac crest arcs laterally toward the posterior superior iliac spine, while inferiorly the ilium transitions into the ischium around the greater sciatic notch. The sacrum sits medial to both hip bones with adjacent lower lumbar vertebrae above, and the proximal femora articulate laterally at the acetabula. Disruption of the posterior ilium in this region raises immediate questions about pelvic ring stability, because the posterior sacroiliac complex carries much of the load transfer between spine and lower limb. A fracture adjacent to the roughened posterior sacroiliac area implies potential involvement of sacroiliac ligaments and should prompt correlation with mechanisms such as lateral compression or vertical shear trauma. Reduction planning often references palpable posterior landmarks (PSIS and iliac crest) and the corridor for iliosacral fixation, while keeping the greater sciatic notch and the expected course of the superior gluteal neurovascular bundle in mind. Use this illustration in orthopedic trauma teaching on pelvic ring injuries, in radiology correlation pieces that pair posterior pelvic anatomy with CT reconstructions, or in surgical atlases describing posterior pelvic approaches and sacroiliac screw trajectories. It also fits anatomy curricula covering the hip bone, sacrum, and sacroiliac joint surface anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.