The European Federation of Neurological Societies/Peripheral Nerve Society criteria for chronic inflammatory demyelinating polyneuropathy improve treatment of patients with chronic immune-mediated demyelinating polyneuropathy, particularly with respect to diagnostic issues. To predict IV immunoglobulin treatment response, the modified American Academy of Neurology criteria are the most valuable classification provided an increased CSF protein level.
The authors report a 44-year-old man with rippling muscle disease (RMD) who does not have a mutation in the caveolin-3 gene. Immunohistochemistry of the muscle biopsy revealed a marked reduction of caveolin-3 and a mosaic pattern of dysferlin immunostaining. Ultrastructural studies showed a loss of caveolae and alterations of the triad. Autoantibodies were directed against the sarcolemma, triad, and several unknown muscle proteins.
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