schis·tor·rha·chis /ʃɪsˈtɔrəkəs, skɪs-/ 名詞
schistorrhachis
n : a not uncommon congenital defect in which a vertebra is
malformed; unless several vertebrae are affected or there
is myelomeningocele there are few symptoms; can be
diagnosed by amniocentesis [syn: spina bifida, rachischisis]