Juvenile osteochondritis dissecans of the knee
Presentation
Knee pain in volleyball player.
Patient Data
Age: 10 years
Gender: Female
From the case:
Juvenile osteochondritis dissecans of the knee
X-ray
Right knee
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Frontal
Ovoid fragment of bone is separated from surface of medial femoral condyle but does not yet lie freely within the joint.
Case Discussion
Osteochondritis dissecans is caracterized by separation of an osteochondral fragment from the articular surface. An osteochondral fragment may be present in situ, incompletely detached, or completely detached. Occurs only on convex surfaces of the bone such as the medial condyle of the femur, capitellum, proximal surface of the talus, head of the first metatarsal. Trauma is the primary insult, and ischemia a secondary injury.
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