Available literature data on monogenic PD is diverse, hampering any genotype-phenotype analyses. Solid genotype-phenotype information offers benefit to patient information and care, e.g. knowledge of a low risk of dementia in parkin-associated PD is important in genetic counseling. We aim to collect phenotype Information of patients with mononegenic PD within the GeoPD Consortium. To do so we ask for the help of all GEOPD members.