Which procedure removes the anterior frontal sinus wall through an external excision above the eye?
a. Osteoplastic flap procedure
b. Caldwell-Luc procedure
c. Killian procedure
d. Turbinectomy
ANS: C
In the Killian procedure, the frontal sinus cavity is reached by removing the floor or anterior wall of the sinus. This forms a large communication and drainage channel into the nose.
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