Developmental and Epileptic Encephalopathy 9

**Semantic type:** Disease or Syndrome

**Definition:** An X-linked subtype of developmental and epileptic encephalopathy caused by mutation(s) in the PCDH19 gene, encoding protocadherin-19.

**Synonyms:** - DEE9 - EIEE9 - Epileptic Encephalopathy, Early Infantile, 9