SCN2A and Seizure: Variants in the SCN2A gene cause three diseases according to the OMIM database: “Developmental and epileptic encephalopathy 11,” “Episodic ataxia, type 9,” and “Seizures, benign familial infantile, 3.” Since the 34-year-old patient had no history of seizures, the condition was thought to be compatible with “Episodic ataxia, type 9.” In this disease, most patients have a history of seizures [33, 34].