Differential diagnosis
| Differential diagnosis: speech and language regression without seizures |
| Autism spectrum disorders |
| Landau–Kleffner dysphasia |
| Language and cognitive deterioration with continuous spike and wave in slow wave sleep (CSWS) |
| Speech deterioration in the epileptic syndrome of congenital bilateral perisylvanian syndrome and opercular syndromes |
| Late onset sensorineural hearing loss |
| Elective mutism |