Considering recent studies suggesting that CD38 biology may be potentially useful to understand PD risk, we sought to determine whether alterations in Cd38 expression are associated with the PD risk allele rs11724635 (C effect allele: OR 0.89; A effect allele: OR 1.1) identified by others (Chang et al. 2017; Nalls et al. 2019). This evidence concerns the gene CD38 and Parkinson disease.