Abstract
This scientific commentary refers to ‘Relevance of genetic testing in the gene-targeted trial era: the Rostock Parkinson’s Disease Study’ by Westenberger et al. (https://doi.org/10.1093/brain/awae188) and ‘Parkinson’s disease variant detection and disclosure: PD GENEration, a North American study’ by Cook et al. (https://doi.org/10.1093/brain/awae142).