Results of surgery of the paranasal sinuses
Computed tomography image showing a patent, wide-open frontal sinus 1 year after endoscopic surgery of all paranasal sinuses, with particular emphasis on the frontal sinuses.
Draf III – frontal sinus drill-out surgery performed in the case of recurrent nasal polyps, e.g. in the aspirin triad.
Draf IIB – one-sided frontal sinus surgery in the case of, for example, benign tumors (osteomas).