72-year-old male patient with left knee pain. Question of medial meniscus tear. MENISCI: There is a horizontal cleavage tear of the posterior horn of the medial meniscus. The anterior horn of the medial meniscus appears extruded. There is increased internal signal within the body of the lateral meniscus suggestive of mucoid degeneration though no discrete tear.ARTICULAR CARTILAGE AND BONE: There is generalized thinning of the lateral tibiofemoral articular cartilage. There is marked generalized thinning of the patellofemoral articular cartilage with a partial-thickness defect within the lateral facet. There is complete loss of the articular cartilage of the weightbearing portion and anterior medial femoral condyle and medial tibial plateau articular cartilage with underlying bone edema; this has progressed compared to the prior study.There are tricompartmental osteophytes. LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact. ADDITIONAL
1. Osteoarthritis of the knee with marked medial compartment articular cartilage loss and underlying bone edema.2. Tearing of the medial meniscus. 