The decision to operate on the frontal sinus is based on persistent symptoms that have been refractory to appropriate medical therapy with associated disease by computed tomography.
CITATION STYLE
Sillers, M. (2016). Balloon catheter dilation of the frontal sinus ostium. In The Frontal Sinus, Second Edition (pp. 233–241). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-662-48523-1_17
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