Journal
SEIZURE-EUROPEAN JOURNAL OF EPILEPSY
Volume 92, Issue -, Pages 52-55Publisher
W B SAUNDERS CO LTD
DOI: 10.1016/j.seizure.2021.08.008
Keywords
Developmental and epileptic encephalopathy; Whole exome sequencing; Drug-resistant epilepsy; Movement disorders; Neurotrophins
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This study described the phenotype of five new cases of NTRK2-related developmental and epileptic encephalopathy (DEE), expanding our knowledge of the phenotype and genotype of NTRK2-related DEE. The phenotype is characterized by early-onset seizures, global developmental delay, and other variable features.
Purpose: This study aimed to describe the phenotype of five new cases of NTRK2-related developmental and epileptic encephalopathy (DEE). Methods: The clinical features, EEG, neuroimaging and genetics were reviewed for cases with likely pathogenic and pathogenic NTRK2 variants and then summarized. Results: Five cases of NTRK2-related DEE were identified. Four had a previously described recurrent variant in NTRK2 and one had a novel variant. The phenotype was characterized by early- onset seizures (infantile spasms, later evolving to multifocal seizures), global developmental delay, variable movement disorders, microcephaly and optic nerve hypoplasia. Conclusions: This series further expands our knowledge of the phenotype and genotype of NTRK2-related DEE.
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