49-year-old man with history of pain and joint line tenderness. MENISCI: The lateral meniscus appears normal. There is complex/"parrot beak" tear of the posterior horn of the medial meniscus with both horizontal and vertical components extending to both femoral and tibial articular surfaces (series 601, images 20-22) with blunting of the meniscus near its root (series 801, image 19).ARTICULAR CARTILAGE AND BONE: There is focal articular cartilage fissuring over the lateral patellar facet (axial series, image 25) with a small amount of subchondral reactive bone marrow change. No additional significant osseous abnormality is noted.LIGAMENTS: The ACL, PCL, MCL, and LCL complex are intact. The popliteus muscle and tendon are intact.EXTENSOR MECHANISM: The patella and extensor mechanism are intact.ADDITIONAL
1.Complex tear of the posterior horn of the medial meniscus.2.Focal chondral fissuring with underlying reactive marrow change involving the lateral facet of the patella.3.Moderate joint effusion and subcutaneous soft tissue edema.