期刊
MUSCLE & NERVE
卷 56, 期 1, 页码 160-162出版社
WILEY
DOI: 10.1002/mus.25476
关键词
CANVAS; cross-sectional area; ganglionopathy; nerve ultrasound; peripheral nerves; sensory neuropathy
Introduction: We report preliminary findings of nerve ultrasound in patients with cerebellar ataxia neuropathy vestibular areflexia syndrome (CANVAS) who have sensory impairment due to dorsal root ganglionopathy. Methods: The ultrasound cross-sectional area (CSA) of median and ulnar nerves of 7 CANVAS patients was compared with 7 age-and gender-matched controls and with the mean CSA of our reference population. Results: The nerve CSA of CANVAS patients was significantly smaller than that of controls at all sites (P< 0.01). All but 1 individual measurement of CSA at the midforearm level in the CANVAS patients fell outside the normal control range and was > 2 standard deviations below the reference mean. Conclusions: The small nerves in CANVAS probably reflect nerve thinning from axonal loss secondary to ganglion cell loss. Our data show a role for ultrasound in the diagnosis of CANVAS ganglionopathy. This may also be applicable to ganglionopathy from other causes.
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