title: Nasal inverted papilloma with involvement of middle ear and mastoid.
abstract: Inverted papillomas of the paranasal sinuses have been characterized by their unusually benign histologic features, their ability to grow rapidly with bony destruction, and their tendency to recur if not adequately treated. The association of inverted papilloma with squamous cell carcinoma is well described, but malignant transformation is relatively rare. We report a case of a multiply recurrent inverted papilloma that spread to the middle ear and mastoid and eventually underwent malignant transformation with skull base invasion. Pathologic examination demonstrated many of the characteristics associated with malignant transformation. In addition, progesterone receptors were demonstrated that may have stimulated this tumor during the patient's pregnancy. To our knowledge, no similar cases have been reported in the literature.
authors.affiliation: School of Medicine, University of Alabama at Birmingham, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Seshul
authors.forename: T L
authors.initials: TL
authors.lastname: Eby
authors.forename: D R
authors.initials: DR
authors.lastname: Crowe
authors.forename: G E
authors.initials: GE
authors.lastname: Peters
mesh_terms: D000328:Adult; D004428:Ear Neoplasms / Q000556:secondary*; D004432:Ear, Middle / Q000473:pathology*; D005260:Female; D006801:Humans; D008416:Mastoid / Q000473:pathology*; D018308:Papilloma, Inverted / Q000473:pathology*; D010255:Paranasal Sinus Neoplasms / Q000473:pathology*; D011980:Receptors, Progesterone / Q000032:analysis; D012888:Skull Neoplasms / Q000556:secondary*
chemical_list: D011980:Receptors, Progesterone