Lateral View Detailing The Anterior Obturator Tubercle On The Hip Bone

Description

Anterior obturator tubercle sits on the anterosuperior margin of the obturator foramen, on the body and superior ramus of the pubis, and is highlighted here from a lateral aspect of the os coxae. Lateral to it, the acetabulum forms the hemispheric socket for the femoral head, while inferiorly the obturator foramen is bounded by the pubic and ischial rami. Posterior to the tubercle, the ischium contributes the posteroinferior rim of the foramen and leads toward the ischial spine and tuberosity, landmarks that help orient the viewer within the hemipelvis. Fine surface relief is the focus. That small tubercle matters because it marks the attachment zone for the obturator membrane along the pubic margin and helps define the superior border of the obturator canal, where the obturator nerve, artery, and vein exit the pelvis to reach the medial thigh. In pubic ramus fractures, pelvic ring disruption, or osteitis pubis, subtle contour changes around the obturator foramen can alter surgical landmarks for plate placement and screw trajectories, and the lateral perspective clarifies the relationship between the pubic bone and the acetabulum without the visual crowding of a full pelvic ring. Orthopaedic and pelvic surgeons will also recognize this region as a reference area when working near the quadrilateral surface and the medial wall of the acetabulum, where hardware misplacement can threaten the obturator neurovascular bundle. Use this illustration in gross anatomy teaching on the hip bone, in orthopaedic trauma texts discussing pubic ramus and acetabular fixation, or in radiology education to correlate pelvic oblique projections and CT bone windows with named bony landmarks around the obturator foramen. It also suits procedural manuals covering obturator nerve block and pelvic approaches that traverse the superior pubic ramus region. Anatomical accuracy verified by SciePro's Medical Advisory Board.