trisomy 21

常见例句

Around 30% of these cases are associated with trisomy 21.
大约30%25这些病例同时合并又21三染色体。
Cases of trisomy 21 were identified from the cytogenetics laboratory logbook.
Down综合征（21三体综合症）的鉴别参照细胞遗传学手册。
Amniocentesis was performed to rule out trisomy 21;the karyotype was normal: 46,XX.
羊水穿刺排除了21三体，染色体组型正常，46，XX。
A short femur is associated with trisomy 21 rather than trisomy 13 and holoprosencephaly.
股骨短与21-三体而不是13-三体或全前脑畸形有关。
Down syndrome (trisomy 21) is a disorder caused by the presence of an extra 21st chromosome.
唐氏综合症（三染色体21）是由于存在额外的第21号染色体而产生的一种疾病。
So this fetus presented seeral signs of trisomy 21, including the hypoplasia of the nasal bone, hypodontia, micrognathia, and hypospadias.
这样，本例胎儿显示21三体的若干征象：包括鼻骨发育不全、牙发育不全、小颌和尿道下裂。