Many people affected by Parkinson’s disease (PD) want to know whether it can be passed down from one generation to the next. Directly inheriting the disease is quite rare. Only about 10 to 15 percent of all cases of Parkinson’s are thought to be genetic forms of the disease (monogenetic). The other 85 to 90 percent of cases are classified as sporadic (or occasional).
Recent studies have begun to demonstrate an important influence of genetic factors on the clinical aspects of the more common sporadic disease.