后鼻孔闭锁(CA)系常见鼻先天畸形,约10～15％伴有其他先天发育畸形,在活产儿中机率约为1/7000～8000,女性较多,如属单侧则右侧更多见,闭锁板90％属骨性、10％为膜性,大多较薄、易穿透,偶由致密骨板构成。病因不明,有3种胚胎发生学说,即颊咽膜残存、颊鼻膜残存及腭骨垂直和水平突的向内方生长,但均不能解释何以闭锁板可为骨性、膜性或混合 Posterior nasal atresia (CA) is a common nasal congenital malformations, about 10 ~ 15% with other congenital malformations, the probability of living children is about 1/7000 ~ 8000, more women, in the case of unilateral more right See, 90% locking plate is a bony, 10% membranous, mostly thin, easy to penetrate, even by the dense plate. The etiology is unclear and there are three types of embryogenesis: the buccal pharyngeal remnants, the buccal and nasal remnants, and the ingrowth of the vertical and horizontal palatal prominences, neither of which explains why the plate can be bony, membranous or mixed