So far, mutations in SNCA (Alpha-synuclein; OMIM#163890), PRKN (Parkin OMIM#602544), DJ1 (Oncogene DJ1 OMIM#602533), PINK1 (PTEN-Induced Putative Kinase 1 OMIM#608309) and LRRK2 (Leucine-Rich Repeat Kinase 2 OMIM#609007) have been implicated as causes of monogenic PD [4-9]. The gene discussed is PRKN; the disease is Parkinson disease.