Brachydactyly, Type A1, with Short Stature, Scoliosis, Microcephaly, Ptosis, Hearing Loss, and Mental Retardation, also known as tsukahara syndrome, is related to radioulnar synostosis with microcephaly, short stature, scoliosis, and mental retardation and radioulnar synostosis-microcephaly-scoliosis syndrome.