Autoimmune conditions tend to clump together - if you get one you are quite likely to have signs of or develop another. I currently have four, vitiligo; a skin thing that makes me develop discoid lesions; psoriasis; and pernicious anaemia. IS PD a fifth? PAS is a medical label for people with an auto-immune syndrome, and doctors at the University of Dundee have done some worok on it. They include PD on their list of conditions........ you mention apoptosis which is what our neurons are susceptible to, in vitiligo the pigment producing cells are also susceptible..........