2020
DOI: 10.1016/j.yebeh.2020.107036
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Variety of symptoms of GLUT1 deficiency syndrome in three-generation family

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Cited by 10 publications
(16 citation statements)
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References 25 publications
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“…Non-classical phenotypes include exercise-induced paroxysmal dyskinesia, "atypical" childhood absence epilepsy, and myoclonic astatic epilepsy; seizures may never occur (14)(15)(16)(17). The present family showed an intrafamilial phenotypic variability, already described in GLUT1-DS (18); the son manifested a classical phenotype with a developmental and epileptic encephalopathy whose diagnosis was supported by biochemical and genetic analysis, whereas his father showed only few typical GLUT1-DS features such as mild cognitive impairment, microcephaly, gait unsteadiness, and mild movement disorders (choreoathetoid features) but no seizures, even though he harbored the same R333W mutation in SCL2A1 confirming the GLUT1-DS diagnosis.…”
Section: Discussionsupporting
confidence: 61%
“…Non-classical phenotypes include exercise-induced paroxysmal dyskinesia, "atypical" childhood absence epilepsy, and myoclonic astatic epilepsy; seizures may never occur (14)(15)(16)(17). The present family showed an intrafamilial phenotypic variability, already described in GLUT1-DS (18); the son manifested a classical phenotype with a developmental and epileptic encephalopathy whose diagnosis was supported by biochemical and genetic analysis, whereas his father showed only few typical GLUT1-DS features such as mild cognitive impairment, microcephaly, gait unsteadiness, and mild movement disorders (choreoathetoid features) but no seizures, even though he harbored the same R333W mutation in SCL2A1 confirming the GLUT1-DS diagnosis.…”
Section: Discussionsupporting
confidence: 61%
“…This disorder belongs to a few treatable neurometabolic disorders, therefore an early detection of Glut1-DS is essential for prompt introduction of ketogenic diet, which enables normal neurodevelopment and can improve patient's life. Establishing the diagnosis of Glut1-DS can sometimes be challenging due to the variability of the clinical picture, the age of onset and phenotypic evolution over time [7]. However, our patient with intellectual disability presented with number of symptoms characteristic for Glut1-DS.…”
Section: Discussionmentioning
confidence: 89%
“…The milder variant of Glut1 deficiency syndrome may start later on during lifetime. The intermediate phenotypes are also encountered [5,7]. Patients with Glut1-DS often show daily fluctuation of the mide, levetiracetam, lacosamide and topiramate was performed in various configurations, with no improvement.…”
Section: Introductionmentioning
confidence: 99%
“…Furthermore, diagnosing a child might result in making a similar diagnosis in the parent, who was not properly diagnosed before. However, such a familial occurrence is rarely described in the literature—there are only a handful of cases described including ours [ 13 , 18 , 19 , 20 ]. Yet, there are some patients suffering from GLUT1-DS (diagnosed based on the clinical presentation and CSF analysis) with no genetic abnormalities in the SLC2A1 gene [ 7 ].…”
Section: Discussionmentioning
confidence: 99%