INTRODUCTION
The etiology of neuropathy was idiopathic in 20%-30% of patients despite thorough investigation, based on results from the 1980s and 1990s. Since then, new etiologies have been recognized, and skin biopsy has been used to confirm small-fiber neuropathy.
METHODS
The authors reviewed the charts of 373 patients with idiopathic neuropathy who were referred to a neuropathy center betw...