一、遗传性耳聋(综合征型和非综合征型)耳聋可由多种原因引起,大约出生1000人中可出现1例先天性的重度耳聋,其中约半数属于遗传性耳聋。遗传性耳聋可分为两类:第一类除听力下降外,还伴有其他临床症状(如头颅、视觉器官、皮肤、四肢骨骼系统等的先天性畸形),被称为综合征型耳聋; First, hereditary deafness (syndrome type and non-syndromic type) deafness can be caused by a variety of reasons, about 1000 births in one case of congenital severe deafness, of which about half are genetic deafness. Hereditary deafness can be divided into two categories: the first category in addition to hearing loss, but also accompanied by other clinical symptoms (such as head, visual organs, skin, limbs and other skeletal systems of congenital malformations), known as syndrome deafness;