Materials and Methods: Cerebral ct findings in 23 cases with 21trisomysyndrome, proved by cytogenetics, were retrospectively analyzed.
材料与方法:回顾性分析23例经细胞遗传学检查证实的21三体综合征的脑部ct表现。
2
Objective: a few trisomy21 cells in normal chromosome karyotype was been observed for study of the correlation of clinical phenotype and development damage in sick children of Down's syndrome.
目的观察正常细胞核型中含有极少量21 -三体细胞的患儿临床表型及发育损害的相关关系。
3
Down syndrome (trisomy21) is a disorder caused by the presence of an extra 21st chromosome.