鼻腔和鼻窦内翻性乳头瘤病因不明,易复发,有恶变倾向。我院1966年8月～1984年4月共收治18例,其中似鼻息肉者7例,占38.9%。为紫红色新生物者5例,占26.7%。暗红色肿块者4例,占22.2%。颗粒状肿块者2例,占11.1%。14例经X 线摄片检查,其中8例鼻窦显示有病变,6例阴性。在8例阳性中, The etiology of inverted papilloma of the nasal cavity and paranasal sinuses is unclear, and is prone to recurrence with a tendency toward malignant transformation. In our hospital from August 1966 to April 1984, a total of 18 cases were treated, including 7 cases of nasal polyps, accounting for 38.9%. Five new cases of purple red creatures, accounting for 26.7%. There were 4 cases of dark red mass, accounting for 22.2%. Granular mass in 2 cases, accounting for 11.1%. Fourteen patients underwent X-ray examination. Among them, 8 showed sinus lesions and 6 were negative. In 8 positive cases,