CDKL5 and Epileptic encephalopathy: Among these 11 patients, 3 patients relapsed from not taking the medication irregularly, 2 patients harbored gene mutations (CDKL5 and KCNT1) associated with epileptic encephalopathy, and the remaining 6 patients had abnormal findings on brain MRI (e.g., encephalomalacia and pachygyria).