Parkinson's Disease

No single test can determine if patient has Parkinson's disease

DEAR MAYO CLINIC: My mother was recently diagnosed with Parkinson's, but she doesn't have many symptoms. I would like her to get a second opinion. Is there a blood test that can determine if the diagnosis is accurate?

ANSWER: There's no one test that can be used to diagnose Parkinson's disease. Instead, the diagnosis is based on a person's medical history and symptoms, along with a neurological and physical exam. If your mother has doubts about her Parkinson's diagnosis, getting a second opinion from a neurologist who specializes in the disease would be reasonable.

Parkinson's disease is a progressive disorder of the nervous system that affects movement. In people who have...