Inclusion body myositis (IBM): myopathy or neuropathy?
Inclusion body myositis (IBM) is described in six elderly patients (three women) and in a young familial patient. They all showed the morphologically characteristic vacuoles containing osmiophilic membranous whorls and intracytoplasmic or intranuclear inclusions. There is a well-delineated bimodal age spectrum of IBM, with onset in the second and sixth decades, but otherwise the disorder seems to be a specific entity. Clinical, electrophysiologic, and morphologic features suggest a neurogenic origin in some cases.
D000368:Aged; D005260:Female; D006801:Humans; D002479:Inclusion Bodies / Q000648:ultrastructure*; D008297:Male; D008875:Middle Aged; D009220:Myositis / Q000473:pathology*; D009422:Nervous System Diseases / Q000473:pathology