The lifespan of someone with Parkinson's disease is between 10 to 40 years.
The age at which a person can live with Parkinson's disease depends on how old the person is to begin with and if the person is only 40 years old or younger then they may live another 40 or even 50 years with the Parkinson's disease.
I had a neighbor lady that lived to 87 years old with Parkinson's disease and she was diagnosed with the Parkinson's disease at age 40 years old.
She struggled with living and doing daily tasks with the Parkinson's disease but she was able to still live a good life.
There's no cure for Parkinson's disease though so once you get the Parkinson's disease it cannot go away.
Parkinson's disease is lifelong and is a disorder of the central nervous system that affects a persons movement and often including tremors.