Choanal atresia is often related to the presence of a congenital abnormality and only a few cases involve the occurrence of mucosal fibrosis of the surrounding choana after trauma.
要后鼻孔闭锁大多数与先天性发育畸形有关，少部分因放射治疗导
后鼻孔周围黏膜组织伤害引起纤维化形成。
Choanal atresia is often related to the presence of a congenital abnormality and only a few cases involve the occurrence of mucosal fibrosis of the surrounding choana after trauma.
要后鼻孔闭锁大多数与先天性发育畸形有关，少部分因放射治疗导后鼻孔周围黏膜组织伤害引起纤维化形成。
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