Presentation
History of left knee injury. Currently complaining of pain.
Patient Data
Age: 20 years
Gender: Male
From the case:
Osteochondritis dissecans of the knee
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Frontal

There is a bony fragment arising from the medial femoral condyle and lying separate to it.
Case Discussion
Appearances demonstrate an osteochondral fragment arising from the medial femoral condyle, consistent with an osteochondritis dissecans. This is thought to be secondary to avascular necrosis.