Acta neurologica Scandinavica. Supplementum
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The diagnosis of Parkinson's disease is purely a clinical diagnosis. The most common types of diagnostic error are a failure either to recognize the early, or unusual symptoms, or to differentiate other tremors and extrapyramidal syndromes from Parkinson's disease. ⋯ This has resulted from the reduction of the excess mortality by levodopa treatment. In the near future, there will be more older parkinsonian patients with a more prolonged duration of the disease.