Epilepsy, Rolandic, with Paroxysmal Exercise-Induced Dystonia and Writer's Cramp, also known as rolandic epilepsy-paroxysmal exercise-induced dystonia-writer's cramp syndrome, is related to benign epilepsy with centrotemporal spikes and convulsions, familial infantile, with paroxysmal choreoathetosis, and has symptoms including dystonia An important gene associated with Epilepsy, Rolandic, with Paroxysmal Exercise-Induced Dystonia and Writer's Cramp is TBC1D24 (TBC1 Domain Family Member 24). Related phenotypes are horizontal nystagmus and writer's cramp