trisomy

A case of trisomy 22 liveborn female baby with multiple congenital anomalies is described.

摘要作者报告一例具有多种先天性异常的三染色体22症的活产。

*X represents monosomy 21,diploid,trisomy 21,tetrasonmy 21 and hexasomy 21 in the corresponding box.

(X表相应栏中的21单体、二倍体、21三体、四体和六体)；

Polysomy, which includes trisomy, is the condition in which one or more chromosomes are represented more than twice in the cell.

多染色体包括三染色体都是一条或多条染色体替了正常细胞中的两条染色体形成的。

So this fetus presented seeral signs of trisomy 21, including the hypoplasia of the nasal bone, hypodontia, micrognathia, and hypospadias.

这样，本例儿显示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。