Table 1.
Manifestation of FDG-PET in patients with the PDs pattern.
| Case | Type of PDs | Frequency of PDs | Period of PET and PDs | Manifestation of PET | Seizure | Etiology | Locations of PDs and PET are congruent |
|---|---|---|---|---|---|---|---|
| 1 | GPDs | 1.71 Hz | Within | Multiregional hypermetabolism | SE | CJD | Yes |
| 2 | BIPDs | 0.85 Hz | Within | Multiregional with regional intense hypometabolism | Focal seizure | Epilepsy | Yes |
| 3 | LPDs | 0.40 Hz | Within | Regional hypometabolism | Focal seizure | Epilepsy | Yes |
| 4 | GPDs | 2.44 Hz | Within | Multiregional hypometabolism | Focal seizure | Epilepsy | Yes |
| 5 | LPDs | 0.21 Hz | Within | Regional hypometabolism | Focal seizure | Epilepsy | Yes |
| 6 | LPDs | 0.44 Hz | Within | Regional hypermetabolism | Focal seizure | Acute viral encephalitis | Yes |
| 7 | GPDs | 1.47 Hz | Within | Diffused with regional intense hypometabolism | Myoclonus | CJD | Yes |
| 8 | LPDs | 1.56 Hz | Within | Regional hypermetabolism | Myoclonus | Tumor | Yes |
| 9 | LPDs | 0.43 Hz | Within | Diffused hypometabolism | None | Dementia | Yes |
| 10 | GPDs | 2.01 Hz | Within | Regional hypometabolism | SE | Stroke | Yes |
| 11 | LPDs | 0.99 Hz | Within | Regional hypometabolism | Focal seizure | Multiple sclerosis | Yes |
| 12 | LPDs | 0.67 Hz | Within | Regional hypometabolism | Focal seizure | Stroke | Yes |
| 13 | GPDs | 1.53 Hz | Before | Multiregional with regional intense hypometabolism | None | Dementia | Yes |
| 14 | LPDs | 1.77 Hz | After | Diffused with regional intense hypometabolism | Focal seizure | Autoimmune encephalitis | Yes |
FDG-PET, 18F-fluorodeoxyglucose positron emission tomography; PDs, periodic discharges; GPDs, generalized periodic discharges; BIPDs, bilateral independent periodic discharges; LPDs, lateralized periodic discharges; SE, status epilepticus; CJD, Creutzfeldt-Jakob disease.