childhood onset GLUT1 deficiency syndrome 2 (MONDO_0012805) is a form of paroxysmal dyskinesia, characterized by painless attacks of dystonia of the extremities triggered by prolonged physical activities. Also known as: DYT18, GLUT1 deficiency syndrome 2, childhood onset, GLUT1 deficiency syndrome type 2, PED, PxMD-SLC2A1, childhood onset GLUT1 deficiency syndrome type 2, dystonia 18, paroxysmal exercise-induced dystonia.