Stage Surgery on Inverted Papilloma which Invaded Lacrimal Sac, Periorbita, Ethmoid and Frontal Sinus

Inverted papilloma of the nasal cavity and the paranasal sinuses is a benign epithelial tumor with a high rate of recurrence, local aggressiveness, and malignant transformation. For these reasons, inverted papilloma has been treated like malignant tumors with extensive surgical resection. With the help of endoscopic sinus surgery technique, it is now available to treat inverted papilloma with stage surgery without severe complications which usually resulted from extensive one stage resection. We report a case of stage surgery on inverted papilloma which invaded lacrimal sac, periorbita, ethmoid and frontal sinus. (J Clinical Otolaryngol 2016;27:143-147)