Pain after injury Due to the patient's body habitus, the high-definition MRI coil could not be used. An alternative coil was used, which slightly limits image quality and evaluation. MENISCI: There is abnormal signal separating the posterior horn of the medial meniscus from its expected tibial attachment indicating a complete or near-complete posterior root tear. Signal abnormality within the retracted root of the posterior horn fibers with corresponding mineralization seen on the recent prior radiographs likely represents a meniscal ossicle. There is extrusion medially of the medial meniscal body with globular increased internal signal indicating intrasubstance degeneration. The lateral meniscus is intact. ARTICULAR CARTILAGE AND BONE: There is severe degeneration of the articular cartilage of the weight-bearing portion of the medial compartment, with areas of the articular surface appearing devoid of cartilage and with mild degenerative signal abnormality in the underlying bone marrow. A small full thickness cleft is seen in the articular cartilage of the lateral tibial plateau. Moderate osteoarthritis affects the patellofemoral joint, with loss of cartilage particularly at the medial eminence and medial facet of the patella. Tricompartmental osteophytes are present. LIGAMENTS: The ACL is indistinct, although we suspect that we can trace a few fibers from the tibia to the femur. This likely represents chronic degeneration versus an old tear of the ACL. The PCL is intact, though we suspect mild chronic degeneration of the PCL as well. The MCL and LCL are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Near-complete to complete tear of the root of the posterior horn of the medial meniscus with a meniscal ossicle in the posterior horn.2. Cartilage degeneration as described above, most severe in the medial compartment.3. Poor visualization of the anterior cruciate ligament, which may represent chronic degeneration or an old tear. 