SLC2A1 and pathologic nystagmus: An association between GLUT1-DS and a mild CoQ10 deficiency has been reported in a 15-year-old girl with truncal ataxia, nystagmus, dysarthria, and myoclonic epilepsy (27) but other studies, investigating the association of GLUT1-DS and CoQ10 deficiency in a larger cohort of GLUT1-DS patients, do not show other similar cases (28).