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Moderate size knee joint effusion.
Medial meniscus is intact. Discoid lateral meniscus occupying nearly 100% of the articular surface; no focal tear. Similar-sized anterior and posterior horns. Meniscofemoral ligament and posterior meniscocapsular attachments are intact.
No parameniscal cyst formation or meniscal body extrusion.
Anterior cruciate ligament is intact. Full-thickness mid-fibre posterior cruciate ligament rupture. Medial collateral ligament is intact. Minimal high signal of the lateral collateral ligament origin. Popliteus muscle belly oedema.