Yukimune Okubo, Moriei Shibuya, Haruhiko Nakamura, Aritomo Kawashima, Kaori Kodama, Wakaba Endo, Takehiko Inui, Noriko Togashi, Yu Aihara, Matsuyuki Shirota, Ryo Funayama, Tetsuya Niihori, Atsushi Fujita, Keiko Nakayama, Yoko Aoki, Naomichi Matsumoto, Shigeo Kure, Atsuo Kikuchi, Kazuhiro Haginoya
Variants of SCN1A represent the archetypal channelopathy associated with several epilepsy syndromes. The clinical phenotypes have recently expanded from Dravet syndrome. CASE REPORT: We present a female patient with the de novo SCN1A missense variant, c.5340G > A (p. Met1780Ile). The patient had various clinical features with neonatal onset SCN1A epileptic encephalopathy, arthrogryposis multiplex congenita, thoracic hypoplasia, thoracic scoliosis, and hyperekplexia. CONCLUSION: Our findings are compatible with neonatal developmental and epileptic encephalopathy with movement disorders and arthrogryposis; the most severe phenotype probably caused by gain-of-function variant of SCN1A...
July 11, 2023: Brain & Development