15-year-old female with persistent swelling and pain of left knee. Evaluate extent of synovial inflammation-synovectomy is a consideration. MENISCI: The medial and lateral meniscus are normal.ARTICULAR CARTILAGE AND BONE: No bone marrow signal abnormality is identified. The articular cartilage of the patellofemoral and tibiofemoral compartments is intact without of focal thinning or fissure.LIGAMENTS: The ACL, PCL, MCL, and LCL complex are intact. The popliteus muscle and tendon are intact.EXTENSOR MECHANISM: The extensor mechanism is normal. The patella appears normal.ADDITIONAL
Synovitis with large joint effusion.