Reason: R knee lateral meniscus tear History: R knee pain and swelling MENISCI: There is a complex tear of the lateral meniscus which consists of a flap of tissue from the posterior horn displaced posteriorly beneath the periphery of the posterior horn of the meniscus. Additional horizontally oriented signal abnormality extends into the body of the meniscus extending to both the femoral and tibial articular surfaces indicating additional tearing. There is also globular increased signal intensity within the anterior horn of the lateral meniscus indicating intrasubstance degeneration which extrudes through the peripheral fibers into multiple parameniscal cysts anteriorly.ARTICULAR CARTILAGE AND BONE: There is a focal full-thickness defect of the articular cartilage of the weightbearing portion of the lateral femoral condyle just above the free edge of the torn posterior horn of the lateral meniscus. The defect measures just under 1 cm in diameter and is associated with underlying degenerative subchondral signal changes. LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: There is focal intermediate signal intensity within the proximal fibers of the patellar tendon at its insertion suggesting focal tendinosis. ADDITIONAL
1. Complex tear of the lateral meniscus as described above.2. Focal defect of the articular cartilage of the lateral femoral condyle.3. Focal patellar tendinosis.