Increased access to genetic sequencing has allowed clinicians to rapidly identify genetic forms of epilepsy, but there is often still insufficient information for an accurate prediction of phenotype from genotype, particularly for mutations in KCNQ2 and KCNQ3, which can present with a wide range of epileptic severity and may have overlapping features.11, 12. The gene discussed is KCNQ3; the disease is epilepsy.