48-year-old man status post right meniscectomy with history of knee pain. MENISCI: The lateral meniscus is unremarkable. There is a horizontal tear of the posterior horn of the medial meniscus (series 7, image 16) extending to the femoral articular surface. Additionally, the posterior horn of the medial meniscus is diminutive and there is slight medial extrusion of the body.ARTICULAR CARTILAGE AND BONE: There is diffuse thinning of both patellofemoral and tibiofemoral compartments. There is also focal fissuring of the cartilage overlying the posteromedial femoral condyle with underlying reactive marrow change and subchondral cyst formation (series 5, image 24).LIGAMENTS: The ACL, PCL, MCL, and LCL complex are intact. The popliteus muscle and tendon are intact. EXTENSOR MECHANISM: The patella and extensor mechanism are unremarkable.ADDITIONAL
1.Complex tear involving the posterior horn of the medial meniscus with mild extrusion.2.Diffuse chondromalacia with focal chondral fissuring over the medial femoral condyle and underlying subchondral cyst.