Infantile Spasms-Psychomotor Retardation-Progressive Brain Atrophy-Basal Ganglia Disease Syndrome An important gene associated with Infantile Spasms-Psychomotor Retardation-Progressive Brain Atrophy-Basal Ganglia Disease Syndrome is SLC19A3 (Solute Carrier Family 19 Member 3). Affiliated tissues include brain, and related phenotypes are global developmental delay and small basal ganglia