Knee effusion. NoneMENISCI: The lateral meniscus is intact. The posterior horn of the medial meniscus appears normal. There is slight medial extrusion of the body of the medial meniscus. There is low signal intensity adjacent to the peripheral margin of the anterior horn of the medial meniscus. It is conceivable this could represent displaced meniscal tissue but it may simply represent peculiar scarring; I am uncertain of its clinical significance.ARTICULAR CARTILAGE AND BONE: There is near full-thickness to full-thickness degeneration of the articular cartilage of the medial facet of the patella with relatively mild degeneration of the articular cartilage of the lateral facet. Small foci of degenerative subchondral signal abnormality are noted within the median eminence of the patella. There is diffuse near-full-thickness to full-thickness degeneration of the articular cartilage of the weightbearing portion of the medial tibiofemoral compartment. There is a subchondral cyst along the posterior aspect of the medial femoral condyle with delamination of the overlying articular cartilage. The articular cartilage of the lateral tibiofemoral compartment appears relatively preserved. There are small tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Osteoarthritis predominantly affecting the patellofemoral and medial compartments.2.Joint effusion and loose body as described above.3.Low signal intensity adjacent to the anterior horn of the medial meniscus is of uncertain significance. It may simply represent a peculiar collection of scar tissue, although I cannot entirely exclude the possibility of displaced meniscal tissue.