“…However, as the ossifying fibroma is a very rare condition, no larger series exist in the literature. Published data are mostly limited to single case reports [2,4,8,9,13], demonstrating the need for further studies to evaluate the possibilities and limits of the endoscopic resection of paranasal ossifying fibromas. This is especially true as endoscopic surgery in this particular area, in the close neighbourhood to delicate structures such as the orbita, the skull base, the optical nerve or the carotid artery, requires the utmost precision, experience and skill on part of the surgeon.…”