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We conclude that if age-specific reference values are applied, CSF glucose and lactate levels are adequate biomarkers in the diagnostic workup of GLUT1 deficiency syndrome. Future availability of whole-exome sequencing in clinical practice will make the existence of a reliable biomarker for GLUT1 deficiency syndrome even more important, in order to interpret genetic results and, even more importantly, not to miss SLC2A1-negative patients with GLUT1 deficiency syndrome. |
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