Subchondral insufficency fracture of the knee
Acute attack of right knee pain and limitation of movement
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A subchondral fracture line is seen at the medial femoral condyle with surrounding marrow edema displaying bright PD FS signal.
Subchondral insuffiency fracture of the knee is a reversible form of spontaneous osteonecrosis of the knee and affects individuals younger in age. Under conservative treatment the marrow signal abnormalities can return to normal.