Figure 14: 63-year-old diabetic patient with exacerbation of chronic rhinosinusitis.
a) CT of the paranasal sinuses, coronal reconstructed image in bone window-level setting. Complete opacification of the right maxillary sinus and obstructed left ostiomeatal complex.
b) Follow-up CT two weeks later after conservative therapy. New onset of headache and diplopia. Coronal reconstructed image in bone window-level setting demonstrates a smoothly marginated subperiostal lesion. Abscess formation was confirmed by surgery.