Sphenoid Sinus Pneumocele-Reply
Abstract
Abstract In Reply.—I believe that there may very well be some confusion over the precise definition of a paranasal sinus pneumocele. As it was defined by Noyek, Zizmor, Bryce, Schaffer, Morrison, Tchang, Maber, Vines, Bonstelle, Floyd, Meyers, Burtschi, Sachdev, Biller and myself,1 there was no localized sinus wall defect other than a postulated trap-valve mechanism at the sinus ostium. In none of these cases was there a history of trauma, surgery, infection, or tumor. The sinus...