结论：部分鼻后孔息肉发源于中鼻甲，鼻内窥镜手术是治疗的较好方法。
Conclusion: Some choanal polyp derive from concha nasalis media, endoscopic sinus surgery is a good method for treatment.
结果：筛骨嵴位于蝶腭孔的前下方，蝶腭动脉分出的鼻后外侧动脉的前方。
Results: Ethmoidal crest was located infra-anterior to the sphenopalatine foramen and anterior to the lateral posterior nasal arteries.
穿过蝶腭孔的动脉有蝶腭动脉，或其分支鼻后外侧动脉和鼻中隔后动脉。
The arteries going straight through the sphenopalatine foramen were the sphenopalatine artery or its branches.
穿过蝶腭孔的动脉有蝶腭动脉，或其分支鼻后外侧动脉和鼻中隔后动脉。
The arteries going straight through the sphenopalatine foramen were the sphenopalatine artery or its branches.
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