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Paranasal sinuses are filled with air Their function is to-humidify and warm the inspired air,provide resonance to voice,lighten the skull bones, andact as thermal insulatorsâ¦ to protect orbit and cranium from variation in temperature of air in our nose Paranasal sinuses are air containing cavities (hollow spaces) in certain bones of skull.
Noncontrast computed tomography (CT) of the paranasal sinuses revealed mucosal hypertrophy blocking the right ostiomeatal complex, thickened ala and lateral wall of the right nasal cavity, and thickened subcutaneous tissue in the malar region (figure 2).