Furthermore, human mutations were recently reported in the RAB39B gene in a family with an X‐linked heritable Parkinsonian syndrome (Wilson et al, 2014) and there is now strong evidence from genome wide association studies that variation in the RAB7L locus confers significant risk to the development of sporadic PD (Nalls et al, 2014). The gene discussed is RAB39B; the disease is Parkinson disease.