40-year-old female with right knee pain, buckling and instability with fall MENISCI: There is a complete radial tear at the junction of the body and posterior horn of the lateral meniscus with lateral extrusion of the body of the lateral meniscus. There is marked attenuation and signal abnormality of the anterior horn lateral meniscus indicating additional extensive tearing. There is a horizontal undersurface tear of the anterior horn of the medial meniscus and perhaps mild fraying along the undersurface of the posterior horn of the medial meniscus.ARTICULAR CARTILAGE AND BONE: There is diffuse full-thickness loss of articular cartilage within the lateral compartment. Signal heterogeneity of the articular cartilage along the medial and central aspects of the femoral trochlea indicate relatively mild degeneration. The patellar cartilage is intact. The medial compartment cartilage is intact. Tricompartmental osteophytes are present. There is an ossicle at the proximal tibiofibular articulation with edema type signal, which is of uncertain clinical significance.LIGAMENTS: Increased signal intensity within the ACL likely represents mucoid degeneration. The PCL, MCL and lateral collateral ligament complex is intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Severe osteoarthritis of the lateral tibiofemoral compartment with extensive tearing and extrusion of the lateral meniscus. Relatively mild osteoarthritis affects the patellofemoral and medial compartments.2.Degenerative undersurface tearing/fraying of the medial meniscus.3.Small ossicle at the proximal tibiofibular articulation containing edema-type signal is of uncertain significance.4.Mucoid degeneration of the ACL and other findings as described above.