Intellectual Developmental Disorder, Autosomal Recessive 39, is also known as severe intellectual disability-short stature-behavioral abnormalities-facial dysmorphism syndrome. An important gene associated with Intellectual Developmental Disorder, Autosomal Recessive 39 is TTI2 (TELO2 Interacting Protein 2). Affiliated tissues include t cells and eye, and related phenotypes are global developmental delay and abnormal facial shape