Findings:
Aplastic left frontal sinus. Near-complete opacification of the paranasal sinuses is noted bilaterally with rarefaction of ethmoid bony septae. The ostio-meatal units, sphenoethmoidal recesses and frontal outflow tracts are compromised with thickened mucosa and retained secretions.
There is mild hyperostosis of the sinus walls of the frontal and maxillary sinuses.
There is demineralization of ethmoid bone septae, nasal conchae and uncinate processes.
Concha bullosa is noted on the left side with mucosal thickening and consequential nasal septal deviation to the right. Hypertrophic inferior nasal turbinates. Polypoid soft tissue densities noted in the nasal cavities bilaterally.
The imaged naso- and oropharynx are unremarkable.
Hyperostosis frontalis interna is noted. The mastoid air cells and the middle ear cavities are clear.
Conclusion:
The radiological features are reflecting chronic changes of pansinusitis, likely due to sinonasal polyposis with several polyps in both nasal cavities.