52-year-old male with right hip pain. Evaluate for right hip AVN. There is avascular necrosis of the right femoral head with the necrotic zone involving nearly the entire epiphysis with edema extending into the intertrochanteric region. There is a large curvilinear subchondral fracture as well as collapse of the articular surface of the femoral head superiorly. Moderate articular cartilage loss is identified superiorly as well as a moderate-sized joint effusion. Although this study was not protocoled for detailed evaluation of the acetabular labrum, there is blunting of the anterior superior labrum with a small undersurface cleft likely representing a tear. The ligamentum teres appears intact. On the large field-of-view images, mild osteoarthritis affects the left hip, but we see no specific features of avascular necrosis affecting the left femoral head. Degenerative disc disease affects the lower lumbar spine. There is decreased signal intensity of the bone marrow of the lower lumbar spine, which is nonspecific and may reflect residual reconverted red marrow, but we cannot entirely exclude the possibility of a myeloproliferative disorder or marrow replacing process.
Avascular necrosis of the right femoral head with other findings as described above.