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Abstract
Two female patients with distal muscular dystrophy (Miyoshi) are reported. Neurological
examination revealed marked weakness and a low skin temperature of both lower legs,
especially over the gastrocnemius muscle. Biopsy specimens of the anterior tibial
muscle exhibited myopathological features compatible with a dystrophic change and
showed positive dystrophin reactions with all six antibodies used. Autonomic nerve
studies in both patients, including laser Doppler flowmetry (LDF), component analysis
of the cardiographic R-R interval and a sympathetic skin response (SSR) test, demonstrated
marked abnormalities, such as sensitive vasoconstrictive responses, a suppressed peak
of low frequency components and an absence of SSR, respectively, compared with findings
in healthy controls. Sympathetic nerve blocking by means of epidural anesthesia produced
clinical improvement and a marked decrease in the serum CK level in one patient. Although
the etiology of autonomic nerve disturbances in these cases remains to be elucidated,
a positive immunoreactivity of nerve growth factor receptor (NGFR) implies the possibility
of some unknown sympathetic neurovascular disorder involving muscle degeneration.
Keywords
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Article info
Publication history
Accepted:
August 15,
1993
Received:
May 31,
1993
Identification
Copyright
© 1994 Elsevier Science B.V. All rights reserved. Published by Elsevier Inc.