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.
摘要后鼻孔闭锁大多数与先天性发育畸形有
，
分因放射治疗导致后鼻孔周围黏
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.
摘要后鼻孔闭锁大多数与先天性发育畸形有，分因放射治疗导致后鼻孔周围黏组织伤害引起纤维化形成。
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