Knee pain MENISCI: There is a complex tear of the medial meniscus predominantly involving the posterior horn and body with both horizontal and vertical components. The tear also consists of a full-thickness radial component through the body and posterior horn. Intermediate signal intensity also extends into the anterior horn indicating intrasubstance degeneration. Additional low signal intensity adjacent to the anterior horn of the medial meniscus presumably represents scar tissue but could also represent displaced meniscal fragments.There is vertically oriented signal intensity along the free edge of the posterior horn of the lateral meniscus likely representing incomplete radial tearing. Additional intrasubstance degeneration is seen throughout the lateral meniscus.ARTICULAR CARTILAGE AND BONE: There is moderate degeneration of the articular cartilage of the medial tibiofemoral compartment. There is a curvilinear subchondral band of low signal intensity within the weightbearing portion of the medial femoral condyle which may represent a stress fracture with surrounding marrow edema or perhaps early osteonecrosis. Mild marrow edema is also evident within the medial tibial plateau.The articular cartilage of the lateral compartment is relatively spared. There is moderate to severe degeneration of the articular cartilage of the patellofemoral compartment with foci of full-thickness cartilage loss along the medial patellar facet and delamination of the articular cartilage of the lateral patellar facet. Mild degeneration of the articular cartilage of the femoral trochlea is also noted.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Complex tear of the medial meniscus with a complete radial component. There is also severe osteoarthritis of the medial compartment with subchondral signal intensity likely representing a stress fracture or developing osteonecrosis.2. Small partial-thickness tear of the lateral meniscus.3. Additional osteoarthritic changes of the knee with a moderate joint effusion and other findings described above.