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
闭锁大多数与先天性发育畸形有关，少
因放射治疗导
后周围黏膜组织伤害引起纤维化形
。
后；后；
后
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.
摘要后闭锁大多数与先天性发育畸形有关，少因放射治疗导后周围黏膜组织伤害引起纤维化形。
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