40-year-old male with severe knee pain and history of amyloidosis. Evaluate for involvement by amyloid. Evaluation of several sequences is limited by motion artifact.MENISCI: Given the above limitations, there is no evidence of meniscal tear.ARTICULAR CARTILAGE AND BONE: There is linear low signal intensity traversing the articular cartilage of the trochlea centrally. This finding has been found to be associated with cartilage fissuring. The remainder of the articular cartilage appears normal given the aforementioned limitations.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: There is intermediate signal intensity at the insertion of the quadriceps on the patella which may represent focal tendinosis but this is equivocal and of questionable clinical significance. There also appear to be very mild inflammatory changes within the subcutaneous fat along the anterior aspect of the patella, of questionable significance.ADDITIONAL
1. Limited study due to patient's motion artifact.2. Focal cleft of the articular cartilage of the femoral trochlea.3. Small joint effusion.4. Scarring of Hoffa's fat pad which may represent prior surgery.5. Mild inflammatory changes within the prepatellar subcutaneous fat, of questionable clinical significance.