Diagnostic criteria of SSPE47
| Definitive: criteria 5 with three more criteria; probable: three of the five criteria. | |
| 1. Clinical | Progressive, subacute metal deterioration with typical signs like myoclonus |
| 2. EEG | Periodic, stereotyped, high voltage discharges |
| 3. Cerebrospinal fluid | Raised gammaglobulin or oligoclonal pattern |
| 4. Measles antibodies | Raised titre in serum (≥1:256) and/or cerebrospinal fluid (≥1:4) |
| 5. Brain biopsy | Suggestive of panencephalitis |