45-year-old female presents with right knee weakness. MENISCI: Large horizontal tear with degeneration involving the entire lateral meniscus. There is also an intermargin tear of the posterior horn of the medial meniscus.ARTICULAR CARTILAGE AND BONE: There is full thickness cartilage loss, particularly along the posterior aspect of the lateral femoral condyle and also of the lateral tibial plateau. There is deep fissuring of the patellofemoral cartilage. Marrow edema in the lateral compartment is noted.LIGAMENTS: No significant abnormality noted. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
Extensive tears involving the lateral meniscus and to a lesser extent the medial meniscus with full-thickness cartilage loss most severe in the lateral compartment.