Other pathogenic or likely pathogenic mutations found in patients with unclassified epileptic encephalopathy included CACNA1A, GABRA1, GABRB3, PCDH19, and CHD2. Epileptic encephalopathies with the above mutations had been designated as EIEE42, EIEE19, EIEE43, EIEE9 and EEOC (childhood-onset epileptic encephalopathy) according to Online Mendelian Inheritance in Man (OMIM). The gene discussed is CACNA1A; the disease is Epileptic encephalopathy.