[Inverted papilloma. Apropos of a multicentric case].

Inverted papilloma is a benign, neoplastic condition of the sinusonasal cavity, independent from other polypoid lesions of the same area. Our case, presented below is, we believe, unique in that it lends credit to the possible multicentric origin of the disease; which started in the right nasal fossa, followed by the left and then the right tympanic cavities in that order.