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Knee Injury - Torn Meniscus (Meniscal Tear). Dramatically depicts a torn medial meniscus and an osteochondral fracture of the tibia.  Surgical steps: 1. Insertion of arthroscopic instruments into the knee; 2. Repair of the tibial surface and a partial meniscectomy; 3. The post-operative appearance, from a superior view of the tibial plateau.