Presentation
Knee pain and swelling and negative history of trauma
Patient Data
Age: 50 years
Gender: Male
From the case:
Spontaneous osteonecrosis of the knee
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Marrow edema of the medial femoral and to lesser extent medial tibial condyles with subchondral flattening of the medial femoral condyle (weight bearing area).
Diagnosis: Spontaneous osteonecrosis of the knee (SONK)
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