Abstract
About 5% of all frontal sinus operations are performed via an external approach. Today, the osteoplastic flap procedure [10] is commonly performed for conditions of the frontal sinus that cannot be successfully treated endonasally [32, 33]. This approach permits an optimal view encompassing the entire frontal sinus, and allows complete microscopic removal of mucosa as well as obliteration of the frontal sinus with abdominal fat, as described by Tato and Bergaglio [30]. It overcomes the problems and complications of the external frontoethmoidectomy according to Jansen [13] and Ritter [25] or Lynch [18], which is an obsolete procedure in modern frontal sinus surgery.
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