Physical examination should include a comprehensive neurologic and musculoskeletal evaluation. Later stages may involve proximal numbness, distal weakness, or atrophy. Early peripheral neuropathy may present as sensory alterations that are often progressive, including sensory loss, numbness, pain, or burning sensations in a “stocking and glove” distribution of the extremities. Diagnosis requires a comprehensive history, physical examination, and judicious laboratory testing. Peripheral neuropathy is idiopathic in 25% to 46% of cases. Common identifiable causes include diabetes mellitus, nerve compression or injury, alcohol use, toxin exposure, hereditary diseases, and nutritional deficiencies. The prevalence of peripheral neuropathy in the general population ranges from 1% to 7%, with higher rates among those older than 50 years. Peripheral neuropathy, a common neurologic problem encountered by family physicians, can be classified clinically by the anatomic pattern of presenting symptoms and, if indicated, by results of electrodiagnostic studies for axonal and demyelinating disease.
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