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Table 2 Seizure information of the six patients with BBSOAS in our clinic

From: Effective treatment of NR2F1-related epilepsy with perampanel

Patient

Age at last follow-up

Age at SZ onset

Seizure type

Brain MRI

EEG

ASMs used

ASMs in use at last follow-up

Time from perampanel administration to seizure-free status

Epilepsy outcomes

1

3 years and 10 months

6 months

IES, GTS

Thin corpus callosum

Bursts of high-amplitude spikes, multiple spikes and spike-and-slow waves, and multiple clinical attacks (with a spasm of the whole body trunk) (at 5 months); Low-amplitude fast waves, spikes and spike-and-slow waves in the right middle and posterior temporal regions during sleep (at 2 years and 5 months);

Steroid, TPM, vitamin B6, perampanel

Perampanel (0.037 mg/kg/day), TPM (4.32 mg/kg/day)

1 months

Seizure-free for 32 months since 1 year and 2 months (seizures began to decrease 1 week after perampanel added)

2

3 years and 5 months

0.5 months

IES

DM

High-amplitude arrhythmia, bilateral discharges mainly in the posterior region (4 months);

Slow spikes and spike-and-slow waves in the bilateral parietal, occipital and posterior temporal areas; a series of focal spasms were detected (6.5 months);

No high-amplitude arrhythmia, spike-and-slow waves, sharp-slow waves in the bilateral posterior head (10 months)

ACTH, magnesium sulfate, vigabatrin, TPM, vitamin B6, KD, perampanel

Perampanel (0.06 mg/kg/day), TPM (11.9 mg/kg/day)

7 months

Seizure-free for 27 months since 1 year and 2 months (seizures began to decrease 2 weeks after perampanel added)

3

8 years 8 months

2 months

IES, GTS, myoclonus

Normal

Spike-slow/sharp-slow wave, multiple spike-and-slow/slow waves mainly in the posterior and the midline areas; isolated and series of spasms or mild tonic attacks (7 years and 6 months);

Spike-and-slow/sharp-slow, slow waves, sharp, and spike wave rhythms mainly in the posterior and midline areas (8 years)

ACTH, vigabatrin, TPM, VPA, CZP, LEV, LTG, perampanel

Perampanel (0.238 mg/kg/day), LTG (withdrawing)

3 months

Seizure-free for 9 months since 7 years and 11 months (seizures began to decrease 6 week after Perampanel added)

4

1 year 8 months

4 months

IES

Normal

Hypsarrhythmia during awake time and sleep, with intermittent phenomenon; three episodes of isolated spasm (7.5 months)

LEV, ACTH, vigabatrin, TPM, vitamin B6, VPA, perampanel

Perampanel (0.214 mg/kg/day, increasing), VPA (withdrawing), TPM (2.68 mg/kg/day)

9 months

Seizure-free for 1 month since 1 year and 7 months (seizures began to decrease 8 weeks after Perampanel added)

5

3 years and 5 months

4 months

IES, focal seizure

Thin corpus callosum

Multifocal slow waves, spikes and sharp waves, and one attack of focal origin was detected (8 months);

6–7 Hz rhythm with medium-to-high wave amplitudes and a 15–20 Hz fast wave rhythm with a large number of continuous discharges in the bilateral occipitotemporal regions (2 years and 7 months);

VPA, TPM, LTG, perampanel

Perampanel (0.5 mg/kg/day), TPM (10 mg/kg/day)

12 months

Seizure-free for 19 months since 1 year and 10 months (seizures began to decrease 4 weeks after perampanel added)

6

2 years and 3 months

2 months

IES, AS, myoclonus

Wider outer frontotemporal space

Multifocal spike-and-slow/sharp-slow waves, spike waves, sharp waves in the bilateral posterior areas. Several spasms were detected, and atonic seizure followed myoclonic seizures (1 year and 6 months)

Perampanel

Perampanel (0.25 mg/kg/day)

12 months

Seizure-free for 9 months since 1 year and 8 months (seizures began to decrease 6 weeks after perampanel added)

  1. SZ seizure, IES infantile epileptic spasms, AS atonic seizure, GTS generalized tonic seizure, DM delayed myelination, ASMs anti-seizure medications, TPM topiramate, VPA valproate, CZP clonazepam, LEV levetiracetam, LTG lamotrigine, ACTH adrenocorticotropic hormone, KD ketogenic diet