Knee pain and swelling MENISCI: Again seen is abnormal intrasubstance signal intensity within the posterior horn and body of the medial meniscus that appears to contact the tibial articular surface, perhaps representing a chronic tear. This appears similar to the prior exam. There is attenuation/deformity and increased signal intensity involving much of the lateral meniscus which has progressed from the prior exam, and there now appears to be a large, radially oriented gap involving the body of the meniscus. These findings may reflect progression of tearing, interval partial meniscectomy changes, or combination of the two. ARTICULAR CARTILAGE AND BONE: There has been progression of cartilage loss in the lateral compartment with much of the weightbearing surface of both the lateral tibial plateau and lateral femoral condyle now devoid of cartilage. Although the articular cartilage of the medial tibiofemoral compartment is relatively spared, there is at least one new small focal full-thickness defect along the medial femoral condyle. There are tricompartmental osteophytes with progression of osteophyte formation along the medial femoral trochlea and loss of the overlying articular cartilage. Subchondral cysts within the tibial plateau appear similar to the prior exam.LIGAMENTS: The ACL is thickened and poorly defined which is suspected to represent progression of mucoid degeneration with associated cyst formation in the intercondylar eminence of the tibia. The PCL, MCL, and LCL appear intact. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Progression of tricompartmental osteoarthritis.2. Lateral meniscus abnormalities suggesting progression of tearing, partial meniscectomy changes, or a combination of both.3. Medial meniscal abnormalities suggesting chronic undersurface tearing which appears unchanged from the prior exam.4. Progressive mucoid degeneration of the ACL.5. Joint effusion with findings indicative of prior hemarthrosis.6. Other findings as above.