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Subchondral insufficiency fracture of the knee

Case contributed by Roberto Schubert
Diagnosis almost certain

Presentation

Medial knee pain, especially on weight-bearing. Partial medial meniscectomy had been performed 10 years earlier.

Patient Data

Age: 60 years
Gender: Male

Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

Cortical irregularity, flattening and articular cartilage erosions of the articular surface of the medial femoral condyle. This is associated with diffuse bone marrow edema of the medial condyle.

Partial medial meniscectomy of the posterior horn is noted.

Case Discussion

Features are suggestive of subchondral insufficiency fracture of the knee (previously known as spontaneous osteonecrosis of the knee), affecting the medial femoral condyle.

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