Hao, S P Transbasal nasal polyposis masquerading as a skull base malignancy. [electronic resource] - Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery Dec 1996 - 556-9 p. digital Publication Type: Case Reports; Journal Article ISSN: 0194-5998 Standard No.: 10.1016/S0194-59989670011-6 doi Subjects--Topical Terms: Diagnosis, DifferentialDiagnostic ErrorsEmpyema--diagnosisFemaleHumansMiddle AgedNasal Polyps--diagnosisSkull Base Neoplasms--diagnosisTomography, X-Ray Computed