There were statistical differences between the adult group and the pediatric group in ethmoid bulla hypertrophy and middle nasal concha etherealization.

筛泡肥大中鼻甲气化出现率在成年成年差异有统计学意义。

Performation of surgical procedures anterior to ethmoid bulla can avoid risks of the other models, therefore, endoscopic frontal sinusotomy in the route anterior to ethmoid bulla is a safe model.

结论通过鼻内镜对额开口及周围剖结构观察，认为星状裂作为恒剖标志是识别额开口关键区域。筛泡前径路是鼻内镜下额开放安全入路，能避免其他径路存在某些风险。