61-year-old female patient with right knee pain and effusion x2 weeks and history of dry tap. Evaluate for meniscal tear. MENISCI: There is blunting of the free edge of the body of the medial meniscus, which may represent mild chronic attritional tearing. We see no fluid-filled or unstable meniscal tear in the medial or lateral menisci.ARTICULAR CARTILAGE AND BONE: There is near full-thickness degeneration of the articular cartilage of the weightbearing portion of the medial femoral condyle and medial tibial plateau anteriorly. There is a small amount of edema type signal and subchondral cyst formation in the anterior aspect of the medial tibial plateau. There is subchondral cyst formation in the posterior aspect of the medial femoral condyle with degeneration of the overlying articular cartilage. There is also focal heterogeneous signal intensity of the articular cartilage of the weightbearing portions of the lateral femoral condyle and lateral tibial plateau, indicating focal degeneration. There is full-thickness degeneration of the articular cartilage of the medial patellar facet.LIGAMENTS: The anterior cruciate ligament, posterior cruciate ligament, medial collateral ligament, and lateral collateral ligament complex are intact.EXTENSOR MECHANISM: There is intermediate signal intensity within the proximal fibers of the patellar tendon that may reflect focal tendinosis, however, this is equivocal and is of uncertain current clinical significance. Otherwise, the extensor mechanism is intact.ADDITIONAL
1.Blunting of the free edge of the body of the medial meniscus may represent mild chronic attritional tearing, but we see no fluid-filled or unstable meniscal tear in the medial or lateral menisci.2.Tricompartmental articular cartilage degeneration, particularly in the medial and patellofemoral compartments.3.Small joint effusion and findings suggestive of minimal synovitis.4.Lobulated fluid collection in the posterior knee may represent cranial extension of a Baker's cyst or a ganglion cyst.