These mutations can be isolated or in the context of a more complex phenotype (GLUT1 deficiency syndrome, GLUT1-DS), which include epilepsy, ataxia, spasticity, dystonia, intellectual disability and other paroxysmal events such as migraine, hemiplegic attacks or episodic ataxia (EA) (7). Here, SLC2A1 is linked to cerebellar ataxia.