In the early stages of the disease, there are no obvious X-ray findings. The presence of radiolucent area in the epiphyseal region and flattening of the femoral condyle can be found in late stages of the disease. MRI has been proven to be both sensitive and specific for the disease. Both T1 and T2 imaging of the MRI shows bone marrow oedema, subchondral low signal, subchondral crescent linear focus, and focal epiphyseal contour depression.
Spontaneous osteonecrosis of the knee
Facet joint arthrosis
Osteoradionecrosis
Post-traumatic arthritis
Calcific bursitis
Retrocalcaneal bursitis
Osteochondritis
Transient synovitis