| Phenotype details |
severe intellectual disability; CK level 300-600IU; muscle weakness; no movement disorder; 6m-onset seizure; infection-related seizures; bilateral tonic-clonic seizure, generalized onset tonic seizures; no status epilepticus; epilepsy course Brodie class A; EEG normal background, ultifocal spikes, sharp, slow and spike-waves, mainly left centro-parieto-temporal; MRI brain normal |