Proximal progressive muscle weakness There is diffusely increased T2 signal throughout the pelvic and thigh musculature most notably involving the vastus muscles and hamstrings. There is diffuse fatty replacement of the pelvic and lower extremity musculature particularly involving the gluteal muscles and posterior compartment although the adductor compartment appears relatively normal in caliber relative to the remaining musculature. Similar abnormal muscle signal is identified in the right lower extremity on the coronal sequence. The sciatic nerve is mildly enlarged and demonstrates slightly increased signal intensity.The marrow signal of the femur is normal.Cystic focus within the urinary bladder may relate to prior surgical reimplantation.
Diffuse edema and fatty replacement of the pelvic and thigh musculature consistent with known history of muscular dystrophy.