Left knee pain MENISCI: Intermediate signal intensity is noted in the posterior horn of the medial meniscus indicating intrasubstance degeneration but there is no evidence of tear of the medial meniscus. There is no discrete lateral meniscal tear.ARTICULAR CARTILAGE AND BONE: Severe articular cartilage loss of the medial compartment is noted particularly of the femoral condyle anteriorly at the level of the anterior horn of the meniscus. There is associated underlying degenerative marrow signal. Additionally, there is abnormal contour of the femoral trochlea posteriorly with multiple ossific fragments identified in the intercondylar notch which may represent osteochondral fragments from prior trauma or loose bodies. There is thinning of the articular cartilage of the lateral compartment although no discrete full-thickness defects are appreciated. Moderate articular cartilage loss of the patellofemoral compartment is noted particularly of the medial facet where there is underlying degenerative marrow signal.Small foci of low signal intensity seen within the joint space may reflect ligamentous or meniscal fragments. LIGAMENTS: The ACL is ruptured. The PCL is intact. The collateral ligaments are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Ruptured ACL.2. Osteoarthritis of varying degrees with articular cartilage loss that is most severe in the medial compartment with suspected loose bodies.3. No discrete meniscal tear.