Menisci
Medial meniscus: grade 3 degenerate complex tear posterior horn extending to inferior articular surface. Mild extrusion.
Lateral meniscus: grade 3 degenerate torn anterior root.
Ligaments
Cruciate ligaments: intact posterior cruciate, grade 2 degenerate intact anterior cruciate.
Medial collateral ligament: superficial and deep components intact. No periligamentous edema.
Lateral collateral ligament: intact
Posterolateral corner structures: Intact
Extensor mechanism
The distal quadriceps and patellar tendons are intact. The patella is normally positioned within the femoral groove. There is no retinacular disruption.
Fluid
Mild suprapatellar effusion. 22 x 6 mm simple Baker cyst.
Osseous and articular structures
Bones: no fractures, stress reaction or osseous lesion is seen.
Patellofemoral compartment: no hyaline cartilage disease.
Medial compartment: grade 2 hyaline cartilage disease. Reduced joint space. Tibial subchondral sclerosis.
Lateral compartment: grade 1 hyaline cartilage disease. Focal medial tibial subchondral edema.