33-year-old female with left knee pain. Evaluate for medial meniscus tear. MENISCI: There is attenuation of the body of the medial meniscus likely representing a combination of a radial tear and additional chronic attritional tearing. The body of the medial meniscus at this location is replaced with intermediate signal intensity on image 16 of series 3 likely representing extensive focal degeneration and additional tearing. There is mild intrasubstance intermediate signal intensity within the posterior horn of the medial meniscus likely representing intrasubstance degeneration, but otherwise the anterior and posterior horns appear intact. The lateral meniscus is normal.ARTICULAR CARTILAGE AND BONE: There is diffuse thinning of the articular cartilage of the weightbearing portion of the medial femoral condyle and medial tibial plateau with a linear full-thickness cartilage cleft centrally along the medial tibial plateau and degenerative low signal intensity in the underlying subchondral bone. The articular cartilage of the lateral femoral compartment appears intact. Focal low signal intensity within the articular cartilage of the lateral facet of the patella and focal high signal intensity centrally within the femoral trochlea likely represent additional sites of cartilage degeneration. There is tricompartmental osteophyte formation.LIGAMENTS: The cruciate and collateral ligaments appear intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Medial meniscus tear and osteoarthritis as described above.