Peripheral neuropathy and folate deficiency as the first sign of Crohn's disease.

A 33-year-old man developed severe sensory peripheral neuropathy associated with low serum folate levels. No systemic disease was identified on the initial evaluation, but 21/2 years later he developed clinical and radiological features of Crohn's disease, confirmed by intestinal biopsy. Thus, sensory polyneuropathy may occur as the first manifestation of Crohn's disease.