69-year-old male with dermatomyositis and ongoing CK elevations. Right femur:Musculature: The diffuse muscular edema seen on prior study has improved markedly on the fat saturated T2 imaging, with only mild increased signal visualized within the adductor magnus. There is also mild signal increase in the hamstrings and gluteus maximus, though it is possible that this represents artifact. There is moderate atrophy of the semimembranosus, similar to prior exam. There is perhaps mild fatty atrophy of the remaining thigh musculature on T1-weighted imaging that appears similar to that seen on prior study. Bone marrow: Bone marrow signal of the femur is within normal limits.Additional findings: Small knee joint effusion. There is a small right hydrocele.Left femur:Musculature: The diffuse muscular edema seen on prior study has improved markedly on the fat saturated T2 imaging, with only mild increased signal within the gluteus maximus and hamstring musculature, but this is equivocal and may be artifactual. Small amounts of diffuse fatty atrophy affect the left thigh, with moderate fatty atrophy affecting the semimembranosus and rectus femoris, unchanged.Bone marrow: Bone marrow signal of the femur is within normal limits.Additional findings: Small and knee joint effusion. There is a small left hydrocele.
Marked improvement of diffuse muscle edema compared to prior study. Bilateral muscular atrophy appears similar to prior study.