43-year-old female patient with right knee pain with medial joint tenderness. MENISCI: The medial and lateral menisci appear normal.ARTICULAR CARTILAGE AND BONE: There is severe degeneration of the articular cartilage of the lateral patellar facet with areas essentially devoid of cartilage. There is also a full-thickness cleft within the median eminence of the patella articular cartilage with underlying subchondral cysts. There is full-thickness degeneration of the articular cartilage of the inferior aspect of the lateral facet of the femoral trochlea with underlying subchondral cysts. There is a 1 cm full-thickness defect of the articular cartilage of the lateral femoral condyle just above the posterior horn of the lateral meniscus with thinning of the articular cartilage above the anterior horn. There is mild focal degeneration of the articular cartilage of the lateral tibial plateau. The medial tibiofemoral compartment articular cartilage appears relatively preserved.LIGAMENTS: The cruciate and collateral limits are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
Osteoarthritis predominantly involving the patellofemoral joint and lateral femoral condyle cartilage with other findings as described above.