Arnold-Chiari malformation
noun [ C or U ] medical specialized uk/ˌɑː.nəld.kiːˈɑːri mæl.fɔːˌmeɪ.ʃən/ us/ˌɑːr.nəld.kiˈɑːr.i mæl.fɔːrˌmeɪ.ʃən/ (also Chiari malformation); (cerebellomedullary malformation syndrome)
扁颅底综合征，阿-希二氏畸形，阿-希二氏综合征
a physical problem present from birth in which part of the brain is pushed through the opening for the spinal cord at the base of the skull, blocking the flow of fluid into the brain and spinal cord