How Is Parkinsons Disease Inherited?
How Parkinson’s disease is inherited is unclear. The majority of people who are diagnosed with Parkinson’s have no family history of the disease. Only in rare cases does Parkinson’s disease run in families. The Parkinson’s Disease Society estimates that five percent of Parkinson’s cases are hereditary, while the U.S. National Library of Medicine estimates the number to be much higher at 15 percent.