Just bumping this up in light of new study showing correlation between PD, prostate cancer, and melanoma. It makes sense if you see the articles linked in the fist post. There have been 25 different pathways leading to PD; interestingly many start out as a form of cancer and then diverge.

It seems there are hub genes some of which are tumor suppressant mutations. One such hub is PTEN. Its mutation can result in several cancers while in PD it shows up in context of major PD mutations like PINK1 and DJ1

See From tumours to tremours

Laura