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Ｄｏｗｎ综合征(ＤｏｗｎＳｙｎｄｒｏｍｅ,简称ＤＳ)又称21三体综合征,亦被称为先天愚型,是以智力发育障碍、特殊面容、心脏畸形为主要特征的遗传综合征。其临床特征除心脏畸形、智力发育障碍、特殊面容外尚有十二指肠闭锁,巨结肠,后鼻孔闭锁,传导性耳聋,食管、肛门和小肠闭锁
Down Syndrome (DS), also known as 21 trisomy syndrome, also known as Down’s syndrome, is a genetic syndrome characterized by mental retardation, special face, and cardiac malformations. Its clinical features in addition to the heart malformations, mental retardation, there are special face outside the duodenum atresia, megacolon, after the nostril atresia, conductive deafness, esophagus, anus and small intestine atresia