Alpha-Thalassemia/impaired Intellectual Development Syndrome, Deletion Type, also known as atr-16 syndrome, is related to alpha thalassemia-intellectual disability syndrome type 1 and syndrome with alpha-thalassemia as a major feature. An important gene associated with Alpha-Thalassemia/impaired Intellectual Development Syndrome, Deletion Type is HBHR (Alpha-Thalassemia/Mental Retardation Syndrome, Type 1). Affiliated tissues include tongue, and related phenotypes are intellectual disability and abnormal erythrocyte morphology