Evaluate for medial meniscus tear. Left knee pain. MENISCI: The medial meniscus appears normal. There is mild deformity of the anterior horn of the lateral meniscus that may reflect interval partial meniscectomy. There is increased signal intensity in the anterior horn, more suggestive of intrasubstance degeneration than a tear. There is horizontally oriented linear increased signal intensity within the body of the lateral meniscus, extending to the femoral articular surface that may represent a horizontal tear, but was present on the prior study. There is a small fluid collection lateral to the body of the lateral meniscus, likely a parameniscal cyst, new from prior. The posterior horn of the lateral meniscus is unremarkable.ARTICULAR CARTILAGE AND BONE: We see no fluid-filled articular cartilage defects. Sclerotic foci in the distal femur likely represent bone islands. Bone marrow is otherwise normal.LIGAMENTS: Cruciate and collateral ligaments are intact. There is a small collection of fluid between the posterior oblique ligament and undersurface of the medial femoral condyle, which may represent a small bursa or ganglion, present on prior study. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. No evidence of medial meniscus tear.2. Small collection of fluid signal intensity deep to the posterior oblique ligament may represent bursa or ganglion, present on prior study and of questionable significance.3. Signal intensity changes of the lateral meniscus suggestive of a horizontal tear of the body of the lateral meniscus, as described above, with a new small parameniscal cyst.