69-year-old male with right knee pain MENISCI: There is moderate extrusion of the body of the medial meniscus. Complex tear of the posterior horn of the medial meniscus extending into the body with a fragment flipped into the intercondylar notch posteriorly. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: Abnormal bone marrow signal is present in the medial femoral condyle and medial tibial plateau indicating a contusion injury. There is a small, nondisplaced subchondral fracture at the posterior medial tibial plateau.Moderate osteoarthritis affects the knee with subchondral cysts and joint space narrowing. There is greater than 50% thinning of the articular cartilage of the medial facet of the patella with underlying subchondral reactive bone marrow edema. There is greater than 50% thinning of the articular cartilage of the anterior medial femoral condyle. There is about 50% loss of articular cartilage of the lateral femoral condyle and lateral tibial plateau.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Nondisplaced small subchondral fracture of the posterior medial tibial plateau with bone marrow edema of the medial femoral condyle and medial tibial plateau indicating contusion injury.2.Complex tear of the posterior horn of the medial meniscus as described above.3.Degenerative changes as described above.