目的 :为经颅面联合进路手术提供额窦的影像解剖学基础。方法 :取 5 0具成人头颅标本 ,行鼻窦多方位薄层CT扫描 ,观测额窦向眶上、眶顶及筛窦上方的气化程度并进行影像解剖学分度。结果 :未发育者占 3 % ;Ⅰ度额窦占 3 2 % ;Ⅱ度占 46 % ;Ⅲ度占 19%。结论 :额窦的气化发育变异很大 ,Ⅲ度额窦的病人不宜采用冠状位颅面联合进路进行手术 OBJECTIVE: To provide the anatomic basis of the frontal sinus for transcranial facial approach surgery. Methods: Fifty adult skull specimens were taken for multi-slice thin-slice CT scan of the nasal sinus to observe the degree of vaporization of the frontal sinus to supraorbital, orbital roof and ethmoid sinus and to conduct anatomical divisions. Results: Undeveloped 3%; Ⅰ degree of sinus accounted for 32%; Ⅱ degree accounted for 46%; Ⅲ degree accounted for 19%. Conclusion: There is great variation in the development of gasification of the frontal sinus. Patients with Ⅲ degree frontal sinuses should not be treated with coronal craniofacial approach