What are the different forms and stages of Parkinson's disease?

https://www.parkinson.org/Unde....rstanding-Parkinsons

Parkinson’s disease (PD) impacts people in different ways. Not everyone will experience all the symptoms of Parkinson’s, and if they do, they won’t necessarily experience them in quite the same order or at the same intensity. There are typical patterns of progression in Parkinson’s disease that are defined in stages. Joseph Jankovic, MD discusses those patterns in terms of the forms and stags of Parkinson's disease.