Abstract

A 59-year old woman presented with progressive paresthesias of all of her limbs for 4 years, associated with neuropathic pain, tingling in the tongue and allodynia, consistent with small-fiber neuropathy (SFN). Several systemic symptoms and signs were found on clinical examination and laboratory work-up. Neurological investigations including neurophysiologic test and skin biopsy supported the diagnosis of SFN. Chronic exposure to N-hexane was then disclosed and suspected to be the cause of the disease. Following the discontinuation of chronic N-hexane exposure, the patient had a progressive improvement of all signs and symptoms, reinforcing the correlation between exposure to N-hexane and development of SFN. Exposure to N-hexane may be considered as a novel reversible cause of SFN, which underlines the need to look for toxic etiologies in the diagnosis of SFN.

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