Absence of articular cartilage at the medial patellar facet, with mild subjacent bone marrow edema and a small (1.4 cm linear ) floating osteochondral fragment within the medial knee gutter.
Lateral femoral condyle bone marrow edema "contusion".
Medial patellar retinaculum injury with lateral patellar displacement.
Grade I proximal MCL injury.
Large knee joint effusion is noted with fluid/fluid level (hemarthrosis).
Muscle edema and contusions in vastus lateralis and medialis.
Rest of the visualized other extensor mechanism structures are preserved. Lateral collateral complex and cruciate ligaments are preserved. Menisci are unremarkable.