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.

鼻孔闭锁大多数与先天性发育畸形有关，少部因放射治疗导致鼻孔周围黏组织伤害引起纤维化形成。