48-year-old female with medial compartment arthritis and recent new injury with locked left knee. Evaluate left knee for medial meniscus tear. Due to the patient's body habitus, the high resolution coil could not be utilized resulting in slightly suboptimal image quality.MENISCI: There is mild attenuation of the posterior horn of the medial meniscus likely representing chronic attritional tearing. There is also intermediate signal intensity within the posterior horn of the medial meniscus extending to the femoral articular surface likely representing degenerative tearing. There is globular intermediate signal intensity within the body likely representing a combination of intrasubstance degeneration and degenerative tearing. There is slight medial extrusion of the body of the meniscus. We see no fluid-filled meniscal tear or displaced meniscal fragment. The anterior horn appears intact. There is globular increased signal intensity within the posterior horn of the lateral meniscus, at its root, likely representing degeneration, but we see no fluid-filled tear.ARTICULAR CARTILAGE AND BONE: There is severe degeneration of the articular cartilage of the medial compartment with full-thickness cartilage loss along the weightbearing portions of the medial femoral condyle and medial tibial plateau with underlying degenerative signal abnormality within the subchondral bone. The articular cartilage of the lateral compartment is relatively spared, although there is degeneration of the articular cartilage of the lateral femoral condyle anterior to the lateral meniscus. Edema within the anterior aspect of the tibia may represent a direct bone contusion. There is also full-thickness articular cartilage loss along the lateral facet of the patella. There are subchondral cysts in the lateral femoral trochlea with overlying cartilage degeneration. Note is made of tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Severe osteoarthritis of the knee with full-thickness cartilage degeneration affecting the medial and patellofemoral compartments.2. Degeneration and degenerative tearing of the medial meniscus, but we see no fluid-filled tear or displaced meniscal tissue.3. Small joint effusion and other findings as described above.