Female 67 years old Reason: evaluate etiology posterior lateral knee pain History: ?ganglion MENISCI: Although we see no discrete tear of the lateral meniscus there is diffuse increased signal intensity within the root of the posterior horn which could reflect mucoid degeneration and/or degenerative tearing. There are small cysts and mild edema-like signal in the underlying intercondylar eminence. There is also intrasubstance degeneration involving the body of the lateral meniscus. There is abnormal signal intensity within the body of the medial meniscus extending to the tibial articular surface likely representing degenerative tearing. Anterior and posterior horns appear intact.ARTICULAR CARTILAGE AND BONE: There is near-full-thickness to full-thickness degeneration of the articular cartilage femoral trochlea inferiorly extending along the anterior aspect of the lateral femoral condyle with cyst formation in the underlying subchondral bone. There is relatively mild degeneration of the cartilage of the patella particularly along the medial facet. There is also cyst formation along the posterior aspect of the medial femoral condyle with mild degeneration of the overlying articular cartilage.LIGAMENTS: Cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: Extensor mechanism is intact.ADDITIONAL
1.Osteoarthritis most severely affecting the femoral trochlea.2.Tear of the body of the medial meniscus and increased signal intensity at the root of the posterior horn of the lateral meniscus which may reflect additional degeneration/degenerative tearing.3.Soft tissue edema including edema along the medial head of the gastrocnemius which may reflect rupture of prior Baker's cyst.4.Other findings as above.