HomeCasesSpontaneous osteonecrosis of the knee
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XRMusculoskeletalConfirmedFRCR 2B

Spontaneous osteonecrosis of the knee

120 views565y Male10/9/2026

A 65-year-old male is referred from outpatient clinic with chronic focal musculoskeletal pain and limitation of physical activities for radiological investigation.

  • 1Oval radiolucency with central sclerosis in the subchondral medial femoral condyle
  • 2Spontaneous osteonecrosis of the knee (SONK) involving the weight-bearing portion of the medial femoral condyle, with associated articular surface impaction fracture
  • 3Maceration and degenerative tears of the body and posterior horn of the medial meniscus is associated with meniscal extrusion and osteophytic lipping
  • 4Incidental Bakers cyst.