67-year-old male with history of fall. MENISCI: There is a 12-mm ossicle within the posterior horn of the medial meniscus near its root ("meniscal ossicle") which likely reflects the sequela of an old meniscal root tear, as the root attachment itself is not visualized. There is also globular signal abnormality within the remainder of the posterior horn extending into the body indicating intrasubstance degeneration.Intrasubstance signal within the lateral meniscus also reflects degeneration, but we see no discrete meniscal tear.ARTICULAR CARTILAGE AND BONE: Severe osteoarthritis affects the knee, particularly at the patellofemoral joint, with portions of the lateral patellofemoral articulation essentially devoid of articular cartilage. There are multiple foci of degenerative signal abnormality within the underlying bone. There is moderate thinning of the articular cartilage along the medial femoral condyle just above the posterior horn of the medial meniscus. There are small subchondral cysts within the anterior aspect of the medial tibial plateau. There is relatively mild articular cartilage degeneration within the lateral compartment. There are tricompartmental osteophytes. LIGAMENTS: The cruciate and collateral ligaments are intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.No evidence of ligamentous tear.2.Meniscal degeneration with no evidence of acute meniscal tear; however there is a large ossicle present within the posterior horn of the medial meniscus likely representing a chronic avulsion/root tear.3.Osteoarthritis most severely affecting the patellofemoral joint.4.Moderate-sized joint effusion.5.Mild soft tissue edema as described above including edema within the popliteus muscle perhaps representing a mild strain.