Royal belgian soc ear, nose, throat, head & neck surgery
B-ENT vol:7 pages:3-13
Type III frontal sinusotomy: surgical technique, indications, outcomes, a multi-university retrospective study of 120 cases. Draf type III is one of the advanced endonasal endoscopic surgeries for the frontal sinus. It was popularised by W. Draf in 1991.