16-year-old female with left knee pain after suddenly changing directions while playing basketball 1 month ago. Knee pain acutely worsened 1 week ago while jumping and patient has been unable to ambulate since that time. MENISCI: There is a longitudinal tear of the medial meniscus, which extends from its posterior horn to its body. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is a partial thickness defect within the cartilage of the lateral femoral condyle and an underlying bone contusion is present. The osseous structures are otherwise normal in appearance.LIGAMENTS: The ACL demonstrates a wavy contour with a heterogeneous appearance. Its fibers are frayed near its insertion on the lateral femoral condyle, however, there are some fibers that reach the surface of the lateral femoral condyle without disruption. The PCL and collateral ligaments are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Partial-thickness tear of the ACL.2. Longitudinal tear of the medial meniscus.3. Cartilage defect of lateral femoral condyle.