Female; 60 years old. Reason: R knee pain, r/o meniscus tear History: locking and catching MENISCI: There is a complex, predominantly radial, tear of the inner half of the posterior horn of the lateral meniscus. There is deformity and intrasubstance signal of the body of the lateral meniscus, which likely reflects a combination of degeneration and extension of the aforementioned tear.There is mild intrasubstance signal seen in the medial meniscus indicating degeneration, but there is no evidence of tear.ARTICULAR CARTILAGE AND BONE: There is full thickness articular cartilage loss of the weight-bearing portions of the lateral femoral condyle and lateral tibial plateau. There is also a full thickness articular cartilage defect along the medial femoral condyle between the meniscal horns measuring approximately 1.5-cm in AP dimension. There is partial thickness articular cartilage degeneration of the patella at the median eminence.Tricompartmental osteophytes are seen. There is a 4-cm lobular lesion in the distal femoral diaphysis, which correlates with a calcified lesion on prior radiographs and which is consistent with an enchondroma.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Complex tear of the lateral meniscus as described above.2. Knee joint osteoarthritic changes with articular cartilage loss as described above.3. Multi-lobulated fluid collection in the soft tissues laterally, which may be due to a migrated parameniscal cyst or ganglion.4. Enchondroma of the distal femur.