Biallelic variants in DJ-1 (oncogene Dj1, MIM*602533) cause a rare Parkinsonism (PARK7, MIM#606324), the third most common AR PD after the PRKN- and PINK1-related forms, accounting for the 0.4 and 1% of EOPD cases, respectively (1). The gene discussed is PRKN; the disease is Parkinson disease.