Muscle weakness Right: There is severe fatty atrophy of the gluteus minimus muscle with mild fatty atrophy of the gluteus maximus and relative sparing of the gluteus medius. There is moderate to severe fatty atrophy of the tensor fascia lata. There is moderate fatty atrophy of the hamstring musculature which most severely affects the semimembranosus and relatively spares the short head of the biceps femoris. There is mild fatty atrophy of the adductor musculature. There is moderate fatty atrophy of the sartorius muscle distally with mild fatty atrophy of the vastus lateralis, medialis, and intermedius muscles. Additionally, there is moderate fatty atrophy of the visualized medial head of the gastrocnemius proximally. On fat suppressed T2-weighted images, there is minimal edema type signal within the vastus lateralis and perhaps vastus medialis but this may simply reflect a component of subacute atrophy as opposed to true inflammation. Mild osteoarthritis affects the knee and hip but the marrow signal of the femur is otherwise normal.Left: There is severe fatty atrophy of the gluteus minimus muscle with mild fatty atrophy of the gluteus maximus and relative sparing of the gluteus medius. There is moderate to severe fatty atrophy of the tensor fascia lata. There is severe fatty atrophy of the semimembranosus with moderate fatty atrophy of the semitendinosus and mild fatty atrophy of the long head of the biceps femoris. There is mild fatty atrophy of the adductor musculature. There is mild to moderate fatty atrophy of the sartorius with mild fatty atrophy of the vastus lateralis, medialis, and intermedius. On fat suppressed T2-weighted images, there is minimal edema type signal within the vastus lateralis and perhaps vastus medialis but this may simply reflect a component of subacute atrophy as opposed to true inflammation. Thee marrow signal of the femur is normal.
Bilateral and symmetrical fatty atrophy of the gluteal and thigh musculature as detailed above.