Right medial joint line pain. Evaluate for meniscus tear. MENISCI: There is a partial thickness radial tear of the posterior horn of the medial meniscus. There is also deformity of the posterior horn of the medial meniscus just medial to its root attachment which may reflect additional tearing and/or an adherent flap fragment of meniscal tissue from the aforementioned radial tear. There is also poorly defined increased signal intensity within the body of the medial meniscus suggesting intrasubstance degeneration that it appears to contact the tibial articular surface, perhaps reflecting undersurface fraying. The anterior horn of the medial meniscus appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is superficial degeneration and fissuring of the articular cartilage of the patella particularly along the median eminence and medial facet. There is a small subchondral cyst within the femoral trochlea centrally with mild heterogeneity of the overlying articular cartilage likely reflecting focal degeneration. There is superficial degeneration of the articular cartilage of the weightbearing portion of the medial femoral condyle. Mild heterogeneity of signal intensity of the articular cartilage of the lateral compartment may reflect mild degeneration, but this is equivocal. The remaining bone marrow signal intensity is normal.LIGAMENTS: Cruciate and collateral ligaments are intact. There is a small bony excrescence arising from the medial epicondyle of distal femur at the proximal attachment of the medial collateral ligament perhaps representing old trauma. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1.Medial meniscal tear as described above.2.Cartilage degeneration as described above.3.Joint effusion.