21-trisomy syndrome 三体综合征
21 trisomy 三体
21 trisomy syndrome 三体综合征
21-trisomy syn-drome 三体综合征
trisomy 21 syndrome 三体综合征 ; 小儿唐氏综合征
Recurrent trisomy 21 复发的21
Trisomy 21, translocation 三体性21,易位
Conclusion: The ultrasonographic measurement data of nt have an important reference value in prenatal screening of fetal 21-trisomy syndrome.
结论：超声测量胎儿nt值，对2 1 -三体胎儿的筛查有重要的参考价值。
The detection rate of the chromosomal abnormality of the abnormal fetus detected by ultrasound (33.33%) was higer than the trisomy 21 high risk group(4.54%) and abnormal delivery group(9.09%)(P<0.05).
其中超声示胎儿异常组染色体异常检出率（33.33%）明显高于21-三体高风险组（4.54%）、不良孕产史组的检出率（9.09%）（P<0.05）。
Materials and Methods: Cerebral ct findings in 23 cases with 21 trisomy syndrome, 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。
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