Target sequencing of a 31 epilepsy-gene panel was performed to exclude alterations in genes (GRIN2A, SCN2A, KCNQ2, SLC6A1, SLC9A6, SYNGAP1, SHANK3, and CNTNAP2) previously associated with electrical status epilepticus during slow-wave sleep (SES) [16,17]. The gene discussed is SCN2A; the disease is epilepsy.