Figure 1. Imaging Studies of Pelvis.

A, (Left) Anteroposterior radiograph of pelvis shows mineralization of iliolumbar ligament (black arrowhead), ossification at the lateral margin of acetabulum (black arrow), osseous proliferation of lesser and greater trochanters, and capsular calcification of the hip joint (white arrows). B, (Right-top) Axial view in computed tomography shows a normal sacroiliac joint (black arrow) but bridging calcification at the inferior margin of the joint (white arrow). C, (Right-bottom) Axial computed tomography shows ossification of the iliolumbar ligament (white arrows).