Long-term follow-up for patients with nonprogressive epilepsia partialis continua in a single center in China

Epilepsia partialis continua (EPC) is a rare variant of epilepsy. Cases from China are rare. We present a case series of seven patients to analyze its clinical features, imagining findings, etiology, drug use, and long-term outcome in a single epilepsy center. We made assessments of drug effects twice (Stage I – when they left our hospital; Stage II in March 2017 – by telephone interviews to rate their long-term outcome). The mean duration of the second follow-up was 4.8 years. Of the seven patients, four patients characterized motor and sensory EPC and three motor EPC. Local distributions of EPC were: the left face (2 patients), right face (1 patient), left leg (3 patients), right leg and arm (1 patient). CT/MR was abnormal in four, normal in two, and not available in one patient. EEG abnormalities commonly consisted of spike-waves, sharp-waves (or) slow wave activity, and periodic lateralized epileptiform discharges. They were all nonprogressive EPC (encephalitis: 2; tumor: 2; head trauma: 1; and not found in 2 cases). In our observations, topiramate might be effective in patients with facial muscles continuous jerking, while carbamazepine in cases of limbs continuous myotonia. Our cases had favorable long-term outcome. Thus, our cases’ etiology differentiated from other regions. Some drugs used by referring to EPC distributions might help to control EPC and their outcome were usually favorable.