79-year-old male with weakness, inflammatory myopathy, recurrent symptoms. Suboptimal examination secondary to patient motion artifact and inability to optimally position the patient.Right femur:There is diffuse and extensive fatty atrophy of the musculature of the right thigh, particularly affecting the vastus musculature. There is diffuse increased signal abnormality within the musculature of the thigh particularly affecting the vastus lateralis and abductor musculature. There are foci of fluid signal intensity along the anterolateral aspect of the vastus lateralis musculature which is nonspecific and may represent confluent edema. Nonspecific subcutaneous edema most pronounced along the lateral and posteromedial aspect of the thigh. No bone marrow signal abnormality is identified. There is a large knee joint effusion which is incompletely imaged.Left femur:There is diffuse and extensive fatty atrophy of the musculature of the left thigh particularly affecting the quadriceps and hamstring musculature. There is diffuse increased signal abnormality within the musculature of the thigh particularly affecting the vastus and abductor musculature. There are foci of fluid signal intensity along the lateral aspect of the vastus lateralis musculature which is nonspecific and may represent confluent edema. Nonspecific subcutaneous edema most pronounced along the posterior and medial aspect of the left thigh. No bone marrow signal abnormality is identified. There is a large knee joint effusion which is incompletely imaged.
1. Nonspecific inflammatory changes of the imaged musculature of the thighs, right greater than left, as well as diffuse musculature fatty atrophy and subcutaneous edema, as described above.2. Bilateral knee joint effusions, left greater than right.