16 year old male with pain. Evaluate for osteochondral lesion. MENISCI: The medial lateral meniscus appear intact.ARTICULAR CARTILAGE AND BONE: Note is made of a 2.1 x 2.3 cm osteochondral defect along the weightbearing surface of the lateral aspect of the medial femoral condyle. There is increased signal abnormality along the superior margins of the defect consistent with an unstable lesion. No definite bony bridging is identified. LIGAMENTS: The cruciate collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Findings consistent with an unstable osteochondral defect along the lateral aspect of the medial femoral condyle as described above. Large joint effusion.