Heterozygous LoF variants in PRRT2 cause movement and seizure disorders including familial infantile convulsions with paroxysmal choreoathetosis (OMIM# 602066), episodic kinesigenic dyskinesia 1 (EKD1, OMIM# 128200), or benign familial infantile seizures 2 (BFIS2, OMIM# 605751), with incomplete penetrance documented [76]. This evidence concerns the gene PRRT2 and paroxysmal dyskinesia.