Table 2: Causes of small fiber neuropathy [6].

Idiopathic     Familial amyloidosis   Autosomal recessive hereditary neuropathy   Hereditary sensory and autonomic neuropathy Inherited Fabry's disease   Ross syndrome   Friedreich's ataxia   Tangier disease   Diabetes mellitus   Impaired glucose tolerance   Alcoholism   Systemic amyloidosis   Vasculitis   Sarcoidosis   Sjögren's disease Acquired Systemic lupus erythematosus   Guillain-Barre syndrome   Antecedent viral infection   HIV   Antisulfatide antibodies   Hyperlipidemia   Complex regional pain syndrome   Paraneoplastic syndrome   Neurotoxic medication