Reason: r/o tear History: pain. Swelling MENISCI: There is globular increased signal abnormality within the anterior horn of the lateral meniscus indicating intrasubstance degeneration. We see no meniscal tear.ARTICULAR CARTILAGE AND BONE: There is full-thickness loss of the articular cartilage along the medial facet and apex of the patella with underlying subchondral cyst formation. There is also near full-thickness cartilage loss along the femoral trochlea, inferiorly. There is a small partial-thickness defect of the articular cartilage along the posterior aspect of the medial femoral condyle as well as tricompartmental osteophyte formation.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact. There is a septated slightly heterogeneous near fluid signal intensity collection anterior to the patella and patellar tendon with mild edema within the adjacent subcutaneous fat, measuring approximately 4 cm in its greatest dimension. This likely represents a prepatellar bursitis, although this could represent a hematoma, particularly if there is a history of trauma.ADDITIONAL
1. Septated slightly heterogeneous collection of near fluid signal intensity in the prepatellar soft tissues likely representing a bursitis, but this could conceivably represent a hematoma if there is a history of trauma.2. Osteoarthritis, particularly affecting the patellofemoral joint, and other findings as described above.