Painful small fiber neuropathy with gastroparesis: A new phenotype with a novel mutation in the SCN10A gene.

Abstract excerpt

Gain-of-function mutations in the SCN10A gene (encoding the Nav1.8 voltage gated sodium channel) have been reported in a small number of patients. All presented with predominantly painful sensory neuropathy, congruent with the expression of Nav1.8 in nociceptive sensory neurons of the dorsal root ganglion. Only a few had mild autonomic symptoms, including dry eyes and mouth, orthostatic dizziness, palpitations,...

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