... age of 8 years, the top of the frontal sinuses is at the level of the orbital roof, and by the age of 10 years, the sinuses extend into the vertical portion of the frontal bone. The final adult ... Tomogra-phy Findings in Chronic Rhinosinusitis Patients with and without Allergy. Asian Pac J Allergy Immunol. 2006;24:123-7. 7. Schaeffer J. The Embryology, Development and Anatomy of the Nose, ... frequency was significantly higher in some populations, including Alaskan Es-kimos (25% in males and 36% in female) and Cana-dian Eskimos (43% in males and 40% in female) [21,22]. According...