syndrome acute encephalopathy with inflammation-mediated status epilepticus idiopathic hemiconvulsion-hemiplegia syndrome true Orphanet:86908 ICD10:G40.4 https://www.medlink.com/index.php/article/hemiconvulsion-hemiplegia-epilepsy_syndrome hemiconvulsion-hemiplegia-epilepsy syndrome MONDO:0019485 HHE syndrome SCTID:230407006 IHHS