Knee pain and swelling. MENISCI: There is marked degeneration and complex multidirectional tearing involving the posterior horn and extending into the body of the medial meniscus with partial extrusion of the medial meniscus. The anterior horn of the medial meniscus appears intact. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is a focus of full-thickness cartilage loss in the weightbearing portion of the medial femoral condyle measuring approximately 8 mm in AP dimension (series 11, image 11) with subjacent reactive bone marrow edema. There is diffuse thinning of the cartilage of the medial tibiofemoral compartment. There is diffuse thinning of the articular cartilage of the lateral patellofemoral compartment with a focus of near full-thickness cartilage loss involving the weightbearing portion of the lateral tibial plateau with associated subjacent reactive bone marrow edema (series 9, image 23). There is also small focus of reactive bone marrow edema involving the anterior aspect of the medial tibial plateau. There is marked thinning of the articular cartilage of the patellofemoral compartment with extensive subchondral cysts particularly involving the lateral facet of the patella.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Marked degeneration and complex multidirectional tearing of the body and posterior horn of the medial meniscus.2.Severe degenerative changes as described above including a focus of full-thickness cartilage loss in the medial tibiofemoral compartment.3.Moderate joint effusion.