64-year-old male with left knee pain. Evaluate medial meniscus. MENISCI: The lateral meniscus appears intact. There is increased signal abnormality and deformity of the posterior horn of the medial meniscus consistent with degenerative tearing. ARTICULAR CARTILAGE AND BONE: There is thinning of the articular cartilage most pronounced along the medial tibiofemoral compartment with foci of full-thickness and near full-thickness articular cartilage defects. There are foci of underlying bone marrow signal abnormality which are likely degenerative in etiology. No sign of tricompartmental degenerative changes including osteophyte formation and joint space narrowing.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Degenerative arthritic changes most pronounced along the medial tibiofemoral compartment with associated degenerative tearing of the posterior horn of the medial meniscus and articular cartilage degeneration, as described above.