tsukuhara syndrome tsukuhara syndrome tsukuhara syndrome, also known as radioulnar synostosis-microcephaly-scoliosis syndrome is an infrequently occurring genetic skeletal dysplasia which is characterized by a combination of radioulnar synostosis, microcephaly, scoliosis, short height, and intellectual disabilities. only 13 cases worldwide have been described in medical literature. tsukuhara syndromeother namesradioulnar synostosis-microcephaly-scoliosis syndromespecialtyorthopedic