79-year-old female with pain over the posterolateral aspect of the knee. Evaluate for meniscal tear versus Baker's cyst. MENISCI: There is globular increased signal abnormality within the medial meniscus consistent with intrasubstance degeneration. There is increased signal abnormality which extends to the tibial and femoral articular surfaces with associated deformity/maceration of the posterior horn and body of the medial meniscus consistent with degenerative tearing. There is medial extrusion of the body of the meniscus. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is full-thickness articular cartilage degeneration along the weightbearing surface of the medial femoral condyle and medial aspect of the tibial plateau with bone marrow edema type signal abnormality, likely degenerative in etiology. There is tricompartmental osteophyte formation. There is near full-thickness articular cartilage degeneration along the lateral facet of the patella. There is near full-thickness to full-thickness articular cartilage degeneration along the medial facet of the patella.LIGAMENTS: The cruciate and collateral ligaments appear intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Osteoarthritic changes including articular cartilage degeneration and degenerative tearing of the medial meniscus as described above.