[Bilateral inverted papilloma originating from the frontal sinus].

Inverted papilloma is a benign neoplasm characterized by its high rate of recurrence, local aggressiveness, and malignancy potential. Nasal obstruction is the most frequent presenting complaint. Bilateral inverted papillom involving both sides of the frontal sinus is extremely rare. Herein, we present a 64-year-old male case with a bilateral inverted papilloma involving the frontal sinus which was removed by an endoscopic surgery.