Posterior Obturator Tubercle Of The Hip Shown, Medial View

Description

Posterior obturator tubercle on the ischium is highlighted from a medial pelvic perspective, adjacent to the inferomedial margin of the obturator foramen. The bony prominence sits on the internal surface of the ischiopubic ramus, just posterior to the obturator groove that contributes to the obturator canal. Superiorly, the rim of the acetabulum lies lateral and posterior relative to the foramen, while the ischial body thickens posteriorly toward the region of the ischial spine and lesser sciatic notch. Small landmark. Big implications. Accurate identification of the posterior obturator tubercle matters because it anchors orientation around the obturator canal, the short passage transmitting the obturator nerve and vessels from the pelvis to the medial thigh. In pelvic and acetabular trauma, fracture lines through the superior and inferior pubic rami or ischium can distort this region, and the medial view helps clarify where fixation hardware or surgical dissection risks encroaching on the canal. The lighting and surface definition emphasize subtle relief at the foramen margin, the kind of detail that gets lost when the obturator membrane and obturator internus are mentally layered back in. Orthopedic educators can place this illustration into modules on the bony pelvis, acetabular fracture patterns (anterior column, anterior wall), and the internal landmarks used to describe approaches that work near the obturator foramen. Pelvic surgeons and anesthetists may also find it useful when correlating osseous boundaries of the obturator canal with obturator nerve block technique and with obturator hernia pathways on cross sectional imaging, where the hernia neck lies close to the canal. Anatomical accuracy verified by SciePro's Medical Advisory Board.