Combined Endonasal Endoscopic and Sub-brow Orbitotomy Access to Manage a Lateral Extending Frontal Sinus Inverting Papilloma with Endo-orbital Invasion: A Case Report

Sinonasal inverting papilloma is a rare benign, locally aggressive tumour, arising from sinus and/or nasal fossa mucosa, with high recurrence rate, and risk of malignant transformation. This is a case of orbital invasive, lateral extending inverting papilloma approached via combined external and endoscopic surgery.