alpha thalassemia-X-linked intellectual disability syndrome (Monarch Disease Ontology identifier MONDO_0010519) can be described as follows. X-linked alpha thalassaemia mental retardation (ATR-X) syndrome in males is associated with profound developmental delay, facial dysmorphism, genital abnormalities and alpha thalassaemia. Female carriers are usually physically and intellectually normal. Also known as: ATR, nondeletion type, ATR-X syndrome, Alpha Thalassemia X-linked Intellectual Disability Syndrome, Alpha thalassemia X-linked intellectual disability syndrome, Alpha thalassemia X-linked mental retardation syndrome, Alpha thalassemia/intellectual disability syndrome X-linked, Alpha thalassemia/mental retardation syndrome X-linked, alpha-thalassemia/intellectual disability syndrome nondeletion type.