Fractured Sacrum, Anterior View

Description

Anterior pelvic anatomy is presented with the sacrum centered between the right and left os coxae, its broad base (promontory) articulating superiorly with L5 across the lumbosacral disc and its tapered apex directed inferiorly toward the coccyx. Paired anterior sacral foramina perforate the pelvic surface, aligned in vertical rows lateral to the fused sacral bodies and medial to the sacral ala, while the sacroiliac joints define the lateral boundaries where the sacrum meets the ilium. A transverse fracture line is highlighted across the mid-to-lower sacrum, with displacement accentuated near the inferior apex, altering the normal smooth anterior curvature and pelvic inlet contour. Landmarks stay clear. Sacral fractures rarely occur in isolation, and this anterior perspective is useful for thinking in pelvic ring mechanics, where a break through the sacral body or ala can couple with pubic rami fractures or symphyseal disruption to create rotational or vertical instability. Fracture level and trajectory also map to neurologic risk: involvement near the anterior foramina raises concern for ventral rami of S1 to S4, while more central patterns can threaten the sacral canal and contribute to bowel, bladder, or sexual dysfunction. Surgeons often reference these relationships when planning iliosacral screw fixation, sacral bars, or lumbopelvic stabilization, because safe corridors depend on foraminal position and the width of the sacral ala, and malreduction at the apex can translate into altered sitting balance and persistent pelvic pain. Use this artwork in anatomy and radiology teaching when correlating pelvic surface landmarks with CT planes, or in trauma education to explain Denis zone patterns, sacroiliac joint involvement, and expected neurologic findings. It also suits operative manuals and patient-facing materials that need a clear anterior orientation for discussing sacral fractures and pelvic ring injury. Anatomical accuracy verified by SciePro's Medical Advisory Board.