Furthermore, we identified rare variants in parkinsonism and dystonia genes, including novel VPS13D homozygous variants in four cases, and heterozygous variants in PD8EB, KCNN2, CSF1R, THAP1, TOR1A, ANO3, GCH1, VPS16, KCDT17, KMT2B, and ATP1A3 genes. The gene discussed is GCH1; the disease is Parkinsonism.