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There are no standard tests to diagnose Parkinson's disease. Diagnosis is usually based on symptoms, medical history and the results of a clinical examination. Symptoms usually do not develop until 80% of the brain’s dopamine producing neurons are damaged. In the early stages the symptoms are milder and diagnosis is difficult.
Several conditions have symptoms and features similar to Parkinson’s disease. These need to be considered while making a definitive diagnosis of Parkinson’s disease. Some of these include:-
Steps in diagnosis of Parkinson’s disease include:-