The right iliac bone demonstrates an ill-defined lytic lesion, with a wide zone of transition. The medial part of the acetabular cortex is poorly seen, potentially representing extension into the joint.
In addition, there is some fullness and increased density of the soft tissues immediately medial to this region within the pelvis, suggesting extension beyond the bone. There are smaller patchy translucencies of the right proximal femur, the inferior pubic ramus and the tuber ischii, as well.