有一些婴儿、少年至青年表现出一些异常的综合体征,这是由于常染色体发生畸变所引起的。本节主要介绍有关常染色体畸变所表现出的一些综合征。(一)先天愚型(唐氏综合征-Down’syndrome、Mongoloid Idiocy): 先天愚型在儿科是一种较为常见的先天性缺陷,其发生率约为1/636～1/365。有特 Some infants, adolescents, and adolescents exhibit some unusual signs of aggregation due to autosomal aberrations. This section describes some of the syndromes shown by autosomal aberrations. (A) Down’s syndrome (Down syndrome, Mongoloid Idiocy): Down’s syndrome in pediatrics is a more common congenital defect, the incidence of about 1/636 ~ 1/365. There are special