{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T13:26:44Z","timestamp":1791638804836,"version":"4.3.4"},"reference-count":19,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,5,17]],"date-time":"2023-05-17T00:00:00Z","timestamp":1684281600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Epileptic Disorders"],"published-print":{"date-parts":[[2023,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>Pathogenic <jats:italic>PRRT2<\/jats:italic> variants cause self\u2010limited (familial) infantile epilepsy (SeLIE), which is responsive to sodium channel blocking antiseizure medications. The interictal EEG is typically normal. We describe a cohort of infants with <jats:italic>PRRT2<\/jats:italic>\u2010related SeLIE with striking peri\u2010ictal EEG abnormalities.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We included all infants diagnosed with <jats:italic>PRRT2<\/jats:italic>\u2010related SeLIE during July 2020 to November 2021 at the Royal Children's Hospital, Melbourne. Clinical features and results of aetiologic investigations were collected from electronic medical records. All EEGs were reviewed independently by two epileptologists.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Ten infants presented with focal seizures at a median age of 5\u2009months (range: 3\u20136\u2009months). Eight had a family history of epilepsy, paroxysmal kinesigenic dyskinesia (PKD) or hemiplegic migraine. Seven of the eight infants with an EEG performed within 24\u2009h of the most recent seizure had epileptiform discharges. Their EEGs showed focal sharp waves, spikes, polyspikes or fast activity independently over the left and right temporo\u2010occipital regions. Conversely, the two infants with last known seizure greater than 24\u2009h prior to their EEG had no epileptiform discharges. Oxcarbazepine was commenced in two infants and was effective. Eight infants were initially treated with levetiracetam, and all were subsequently switched to oxcarbazepine due to ongoing seizures or side effects.<\/jats:p><\/jats:sec><jats:sec><jats:title>Significance<\/jats:title><jats:p>Posterior polymorphic focal epileptiform discharges on a peri\u2010ictal EEG recording are a feature of <jats:italic>PRRT2<\/jats:italic>\u2010related SeLIE. This finding, particularly in the presence of a family history of infantile epilepsy, PKD or hemiplegic migraine, suggests a diagnosis of <jats:italic>PRRT2<\/jats:italic>\u2010related SeLIE and has important treatment implications.<\/jats:p><\/jats:sec>","DOI":"10.1002\/epd2.20072","type":"journal-article","created":{"date-parts":[[2023,5,12]],"date-time":"2023-05-12T03:15:10Z","timestamp":1683861310000},"page":"510-518","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Peri\u2010ictal <scp>EEG<\/scp> in infants with <i>PRRT2<\/i>\u2010related self\u2010limited infantile epilepsy"],"prefix":"10.1002","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5358-333X","authenticated-orcid":false,"given":"Nicola","family":"Fearn","sequence":"first","affiliation":[{"name":"Department of Neurology The Royal Children's Hospital  Parkville Victoria Australia"},{"name":"Murdoch Children's Research Institute  Parkville Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9894-4610","authenticated-orcid":false,"given":"Emma","family":"Macdonald\u2010Laurs","sequence":"additional","affiliation":[{"name":"Department of Neurology The Royal Children's Hospital  Parkville Victoria Australia"},{"name":"Murdoch Children's Research Institute  Parkville Victoria Australia"},{"name":"The University of Melbourne  Parkville Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laura","family":"Moylan","sequence":"additional","affiliation":[{"name":"Department of Neurology The Royal Children's Hospital  Parkville Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5469-8411","authenticated-orcid":false,"given":"Katherine B.","family":"Howell","sequence":"additional","affiliation":[{"name":"Department of Neurology The Royal Children's Hospital  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