Severe Early-Onset Polyneuropathy in Insulin-Dependent Diabetes Mellitus

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Abstract
The pathophysiologic features of diabetic neuropathy, a common and disabling long-term complication of diabetes mellitus, are poorly understood. We studied five patients, 22 to 34 years old, in whom an uncommonly severe symmetric polyneuropathy developed soon after the onset of insulin-dependent diabetes. Their autonomic function and nerve conduction were studied, and sural-nerve biopsy specimens were examined by light and electron microscopy. Other causes of neuropathy were carefully excluded.