Male, 40 years old. Polyneuropathy. H/O cutaneous amyloid. There is mild to moderate muscle atrophy diffusely which more prominently affects the gluteus musculature and appears to be symmetric bilaterally. Otherwise, the soft tissue structures of the right thigh are unremarkable, without soft tissue edema, solid mass lesion, or discrete fluid collection. The imaged neurovascular structures are grossly intact. The underlying osseous structures are unremarkable, with normal cortical thickness and marrow signal. Nondedicated images of the right hip are grossly unremarkable.
Bilateral muscle atrophy without other significant MR abnormality to account for the patient's symptoms.