Osteochondritis Dissecans of the Knee

Abstract

Osteochondritis dissecans is a disorder in which a fragment of cartilage and subchondral bone separates from an articular surface. The etiology is uncertain, although trauma and ischemia have been implicated. The knee is most commonly affected, but the elbow and ankle may also be involved. Patients typically present during their adolescent or early adult years with nonspecific knee pain and swelling that worsens with activity. The diagnosis is confirmed by radiographic findings. Management decisions are based on the patient's age and the stability, location, and size of the lesion.

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“…All OCD knees should then be imaged via MRI to assess the lesion for stability as stable and unstable lesions are managed differently ( 4 ). Since 75 -80% of all knee OCD occurs at the medial femoral condyle, the Wilson's test may assist your diagnostic efforts ( 6 ). The Wilson's test elicits pain by causing a tibial spine to grate against the medial femoral condyle.…”

“…Thus, OCD is a radiologic diagnosis ( 3 ). In addition to AP fi lms, lateral and tunnel views should also be obtained to avoid missing lesions not seen on AP fi lms alone ( 6 ). All OCD knees should then be imaged via MRI to assess the lesion for stability as stable and unstable lesions are managed differently ( 4 ).…”