Male 21 years old Reason: Rule out meniscus tear. MENISCI: No significant abnormality noted.ARTICULAR CARTILAGE AND BONE: There is edema within the posterior aspect of the lateral femoral condyle. This edema is associated with an approximately 1.5 cm curvilinear focus of low signal intensity (series 7, image 22) in the subchondral bone marrow of the posterior aspect of the lateral femoral condyle, possibly representing a nondisplaced subchondral fracture. The overlying cartilage appears intact. There is no adjacent soft tissue edema. Tiny focus of bone marrow edema is seen just subjacent to the proximal attachment of the medial collateral ligament.LIGAMENTS: No significant abnormality of the cruciate or collateral ligaments. There is edema along the proximal fibers of the medial patellar retinaculum with poor visualization of the femoral attachment of the medial patellofemoral ligament.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Edema along the medial retinacular structures posteriorly with poor visualization of the medial patellofemoral ligament at its attachment suggesting at least a partial thickness tear.2. Edema within the posterior aspect of the lateral femoral condyle with possible nondisplaced subchondral fracture. This edema is more posterior than would be expected with transient patellar dislocation.3. No evidence of meniscal tear.