Female 67 years old Reason: left knee pain; evaluate for tendon/meniscus/ligament injury History: left knee pain MENISCI: There is intrasubstance signal in the posterior horn of lateral meniscus that does not appear to contact the articular surface. There is a radial tear of the posterior horn root junction of medial meniscus causing mild extrusion of the medial meniscus.ARTICULAR CARTILAGE AND BONE: Areas of full-thickness cartilage loss involving the medial femoral condyle and medial tibial plateau with subchondral sclerosis.Full-thickness cartilage loss involving the lateral femoral condyle especially in the trochlea. Full-thickness cartilage loss with bony remodeling of the patella and trochlea there is extensive subchondral sclerosis.LIGAMENTS: Anterior and posterior cruciate ligaments are intact. EXTENSOR MECHANISM: Quadriceps tendon and patellar tendon are intact.ADDITIONAL
Radial tear of the posterior horn of the medial meniscus with mild extrusion.Mild osteoarthritis of the lateral compartment with cartilage loss.Moderate to severe osteoarthritis of the medial compartment with cartilage loss.Soft tissue mass arising from the tibial nerve posterior to the knee with imaging features compatible with a peripheral nerve sheath tumor. Likely represents a schwannoma but cannot be completely classified with a noncontrast MRI.