Usluer et al found that the PRRT2 mutation is the most common cause of benign familial infantile epilepsy and is found in approximately 80% of benign familial infantile epilepsy families.[45] Okumura et al found that PRRT2 mutations are very common in Japanese patients with benign infantile epilepsy, especially in those with a family history of paroxysmal dyskinesia.[46]. This evidence concerns the gene PRRT2 and paroxysmal dyskinesia.