What diseases or physical conditions can cause Parkinson's?

What diseases or physical conditions can cause Parkinson's?

Neal Hermanowicz (Director of the Movement Disorders Program) gives expert video advice on: What causes Parkinson's?; What role does race play in Parkinson's?; What is a 'parkinsonian personality'? and more...

There are other things that can look like Parkinsons disease, but not really cause Parkinsons disease by our definition of having those specific brain changes present. Other disorders - there's something called normal pressure hydrocephalus which we think comes as a completely different entity, but it looks like Parkinsons disease sometimes. People who have multiple small strokes may look as though they have Parkinsons disease, but there's no other process that we know of that creates identical changes in the brain, as does Parkinsons disease.