A group of rare movement and seizure disorders caused by changes (disease-causing variants or mutations) in the PRRT2 gene. They include a spectrum of specific disorders including paroxysmal kinesigenic dyskinesia (PKD), benign familial infantile epilepsy (BFIE), paroxysmal kinesigenic dyskinesia with infantile convulsions (PKD/IC) and hemiplegic migraine (HM). In addition, PRRT2 pathogenic variants have been identified in other childhood-onset movement disorders and different types of seizure conditions, such as paroxysmal torticollis, episodic ataxia and familial paroxysmal non-kinesigenic dyskinesia. It’s important to note that these disorders can also have different genetic causes.
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