I just got the results of my 23andme genetic test, it was free and worth every cent! I learned a lot about myself and my background. I also learned about mt PD. My neuro said I didn't "present in the usual way". I guess I didn't have the normal problems, one is I don't have visible tremors (neither do about 30% of pwp). I did however have a lot of problems with balance and gait, shuffling and tripping and falling. Seems that I have a genetic mutation in the LRRK2 gene or region. It is the G2019S mutation, which can cause postural insability and gait problems. It also appears to be inheritied or at least family related. My mothers dad had PD, the other thing I found out was that my risk of alzhimers is much higher than normal, my fathers mother had alzhimers. This is a very worth while test, if you have a diagnosis of PD the test is free, also because of the paticular mutation I have, the G2019S mutation makes the test free to my entire family for researce interest. I learned a lot more but I found this the most important to me and my family.