Mutations in DJ1 (PARK7, a regulator of the tumor suppressor PTEN) is observed in PD patients and in breast, lung, pancreatic, gastric and prostate cancers (Hod, 2004; He et al., 2011; Zeng et al., 2011; Kawate et al., 2013; Li et al., 2013). Here, PARK7 is linked to Parkinson disease.