familial hemiplegic migraine genetic developmental and epileptic encephalopathy hemiplegic migraine-developmental and epileptic encephalopathy spectrum https://github.com/monarch-initiative/mondo/issues/7195 MONDO:0100539 GARD:0026271 A spectrum in which individuals may present with phenotypes ranging from hemiplegic migraines without epilepsy to developmental and epileptic encephalopathy with or without episodic hemiplegia or other forms of paresis. Symptoms and severity may vary within families.