" from a research point of view , this is the first instance we will identify what appears to be typical parkinson ' s syndrome cases before people develop signs , " says mayo clinic neuroscientist tom sydenham . " we know if he inherits the mutation they are starting to get parkinson ' s failure . " the mutation was discovered by sequencing the lrrk2 sequence in persons with parkinson ' s from the us , norway , ireland and poland .
A genetic mutation has been linked with Parkinson's disease.