68-year-old male with weakness secondary to myopathy. Assess for myopathy and which muscle is appropriate for biopsy. There is mild increased signal abnormality on fluid sensitive sequences within the quadriceps musculature, particularly involving the vastus lateralis, and to a lesser degree the vastus intermedius, which is most pronounced along the lateral aspect of the mid thigh/mid femoral diaphysis. Image support for guided sampling could be considered. There is also minimal increased signal abnormality within the adductor musculature of the left hip. There is mild diffuse fatty atrophy of the musculature of the left thigh, particularly affecting the semimembranosus and semitendinosus muscles. There is a small amount of nonspecific edema within the soft tissue anterior to the patella. There is also increased signal abnormality within the vastus lateralis of the right thigh as seen on the large field-of-view images. No bone marrow signal abnormalities identified. There is a small Baker's cyst.
Nonspecific increased edema type signal abnormality within the quadriceps musculature, bilaterally, suggesting a myositis, as described above. 