17-year-old male with pain and instability. Evaluate for ACL tear. MENISCI: There is linear increased signal abnormality within the posterior horn of the lateral meniscus which extends to the femoral articular surface consistent with a horizontal tear. Additionally, there is a linear focus of increased signal abnormality along the free edge of the posterior horn of the lateral meniscus consistent with a radial tear. The anterior horn appears intact. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is a tiny focus of partial-thickness articular cartilage degeneration along the posterior aspect of the weightbearing surface of the medial femoral condyle. The lateral tibiofemoral compartment appears relatively spared. Note is made of a lesion within the posterior aspect of the distal femoral metaphysis consistent with the findings of a nonossifying fibroma seen on recent radiographs.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Tearing of the lateral meniscus as described above.2. Small joint effusion.