Abstract：
Trisomy 18 (Edward syndrome) was first described by Edwards et al. in 1960. The condition is the second most common autosomal trisomy syndrome in males. The prevalence in infants is estimated as 1/6000-1/8000. Those affected have a high mortality rate - only 4% may survive their first year.
摘要：
18三体(爱德华综合征)首先由Edwards等人描述。在1960年。该病症是男性中第二常见的常染色体三体综合征。婴儿的患病率估计为1/6000-1/8000。受影响的人死亡率很高-只有4％的人可以在第一年生存。
