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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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。

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Objective: a few trisomy 21 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。

youdao

Triple X syndrome is also called trisomy X, triplo X syndrome and XXX syndrome.

CNN: Triple X syndrome

He and his wife of 22 years, Claudia, have no children, and the cause became important to them after their niece was born with trisomy 13, a syndrome caused by an extra 13th chromosome.

FORBES: The New Barbarians

In her lab, Dr. Cherry said she had found four out of six positive results for Trisomy 18, or Edwards syndrome, which the tests also detect, appeared to be false alarms after follow-up testing.

WSJ: New Questions on Cutting-Edge Prenatal Tests