Intellectual Developmental Disorder, Autosomal Recessive 48, is also known as progressive essential tremor-speech impairment-facial dysmorphism-intellectual disability-abnormal behavior syndrome. An important gene associated with Intellectual Developmental Disorder, Autosomal Recessive 48 is SLC6A17 (Solute Carrier Family 6 Member 17). Affiliated tissues include breast and brain, and related phenotypes are global developmental delay and macrotia