目的:探讨鼻内镜术中与额窦开口有密切关系的解剖标志。方法:总结37例(56侧)额窦开放手术患者手术资料,分析与额窦开口相关的解剖标志。结果:以钩突为主要解剖标志找寻额窦口,37例(56侧)术中均准确定位并顺利开放额窦口,无严重并发症发生。结论:鼻内镜术中利用钩突、筛泡及中鼻甲根部等解剖标志联合定位额窦开口,安全、准确、可行。 Objective: To explore anatomic landmarks closely related to the opening of the frontal sinus in endoscopic sinus surgery. Methods: The operation data of 37 patients (56 sides) with open frontal sinus surgery were summarized, and the anatomic landmarks related to frontal sinus opening were analyzed. Results: Hypoplasia was the main anatomical landmark for the frontal sinus. 37 cases (56 sides) were correctly positioned and the frontal sinus was opened smoothly without serious complications. Conclusion: Endoscopic sinus surgery using the uncinate process, mesangial and middle turbinate root and other anatomical landmarks to locate the frontal sinus openings, safe, accurate and feasible.