Parkinson disease Young adult-onset Parkinsonism true Young-onset Parkinson disease OMIM:615528 OMIM:605909 OMIM:168601 OMIM:613643 OMIM:610297 OMIM:602404 OMIM:606324 OMIM:614251 OMIM:607060 Early-onset Parkinson disease Young-onset Parkinson disease (YOPD) is a form of Parkinson disease (PD), characterized by an age of onset between 21-45 years, rigidity, painful cramps followed by tremor, bradykinesia, dystonia, gait complaints and falls, and other non-motor symptoms. A slow disease progression and a more pronounced response to dopaminergic therapy are also observed in most YOPD forms. OMIM:616840 OMIM:614203 orphanet ICD10:G20 OMIM:600116 OMIM:605543 OMIM:606852 OMIM:607688 OMIM:300557 Rare parkinsonian syndrome due to genetic neurodegenerative disease