Osteochondritis dissecans

Case contributed by Bahman Rasuli
Diagnosis almost certain


Chronic knee pain after trauma.

Patient Data

Age: 30 years
Gender: Male

Osteochondral defect of the middleweight bearing of the medial femoral condyle measuring 8 x 17 mm is present.

Mild joint effusion is seen.

Horizontal tearing is present at the body and posterior horn of the medial meniscus.

Abnormal intrasubstance increased signal is present along the course of ACL fibers related to ACL sprain. PCL is unremarkable.

Case Discussion

Features are consistent with osteochondritis dissecans. The lateral aspect of the medial femoral condyle is the most common site for osteochondritis dissecans.

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