Finally, a third group, DRD look-alikes, was also suggested, which encompasses neurodegenerative (e.g., ataxia telangiectasia) or non-neurodegenerative (e.g., TOR1A-related dystonia, GLUT1 deficiency syndrome, myoclonus–dystonia) conditions that do not involve the nigrostriatal dopaminergic system, or neurodegenerative disorders that involve the nigrostriatal dopaminergic system (e.g., juvenile Parkinson’s disease, pallidopyramidal syndrome, and spinocerebellar ataxia type 3) [93]. This evidence concerns the gene SLC2A1 and Dystonia.