000 02338cam a2200265 4500500
005 20250121162521.0
041 _afre
042 _adc
100 1 0 _aYamagishi, Hirokazu
_eauthor
700 1 0 _a Goto, Masahide
_eauthor
700 1 0 _a Osaka, Hitoshi
_eauthor
700 1 0 _a Kuwajima, Mari
_eauthor
700 1 0 _a Muramatsu, Kazuhiro
_eauthor
700 1 0 _a Yamagata, Takanori
_eauthor
245 0 0 _aPraxis-induced reflex seizures in two Japanese cases with ring chromosome 20 syndrome
260 _c2020.
500 _a5
520 _aRing chromosome 20 syndrome is an epileptic and neurodevelopmental encephalopathy that occurs in children, characterised by a triad of refractory frontal lobe seizures, recurrent non-convulsive status epilepticus and frontal lobe-dominant paroxysmal discharges. However, details of other clinical features associated with ring chromosome 20 syndrome remain unknown. Here, we report two patients with ring chromosome 20 syndrome who had praxis-induced reflex seizures. Case 1 was an 11-year-old girl who presented with seizures triggered by specific activities such as mental and written calculations, writing, decision-making, recall, sudden changes in routine or ambient temperature and bathing. During calculations, left frontal lobe-dominant, 3-Hz slow-wave bursts were observed on EEG. Lacosamide effectively suppressed her tonic seizures. Case 2 was a six-year-old boy who presented with seizures triggered by specific activities such as calculations, recall and bathing. During calculations, frontal lobe-dominant, 3-Hz spike and slow-wave bursts were observed on EEG. Although his epilepsy was refractory, gabapentin reduced the frequency of focal seizures.In both cases, the hyperexcitability in the frontal lobe may have spread to the motor cortex and precipitated praxis-induced seizures. Therefore, in addition to the known characteristic triad, praxis-induced reflex seizures may also be a feature of ring chromosome 20 syndrome.
690 _anon-convulsive status epilepticus
690 _apraxis-induced seizure
690 _aring chromosome 20
690 _areflex seizure
786 0 _nEpileptic Disorders | Vol 22 | 2 | 2020-02-01 | p. 214-218 | 1294-9361
856 4 1 _uhttps://shs.cairn.info/revue-epileptic-disorders-2020-2-page-214?lang=en&redirect-ssocas=7080
999 _c611403
_d611403