Osteochondritis dissecans of the knee

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Osteochondritis dissecans (OCD) most commonly affects the knee. See osteochondritis dissecans article for a general discussion.

Pathology

Location

The condition occurs bilaterally in 25% of cases, and has a characteristic distribution:

medial condyle: 85% ^2,4
- "classic" lateral surface of the medial condyle: 69%
lateral condyle: 15%
- inferocentral portion: 13% ⁴
- anterior surface: 2%
patello-femoral groove: uncommon
weight-bearing surface of the tibia: uncommon

Radiographic features

These are discussed in the general article on osteochondritis dissecans.

Differential diagnosis

The differential diagnosis includes:

normal fusing apophysis: painless
acute osteochondral fracture

In older patients consider:

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