“…The treatment of choice is the complete surgical removal of the tumor, which is based on the so-called subperiosteal resection with removal or drilling of the bone at the attachment site [8,10,11,12,13,14,15,16,17,18,19,20,21]. Currently, endoscopic techniques are considered to be the standard procedure for most of the cases [1,2,10,22], but, in principle, an individually adapted surgical strategy is recommended [9,11,12,23,24,25]. Inverted papillomas of the maxillary sinus are difficult to treat, because a considerable portion of the maxillary sinus cannot be adequately visualized and reached, even with the use of angled endoscopes and instruments [10,26,27,28].…”