Common Drainage Pathway From Bilateral Frontal Sinuses: Lessons From 2 Cases

Primary pneumatization of the frontal bone occurs in first year life, but further continues until 18 years age. Elongation ethmoidal infundibulum and recess, or upwards migration anterior cells has been proposed as a mechanism sinus development. The drainage pathway is displaced posterior direction depending on pattern frontoethmoidal cells. Also, sinuses can be connected to directly middle meatus superior attachment uncinate process. Bilateral are separated by their bony septum, thus have own pathways. Contrary this general rule, we experienced two cases that were each other, showing single from both sinuses. We report these along with literature review. Key words: Anatomic variation ㆍ Drainage Frontal sinusitis Multidetector computed tomography