鼻腔和鼻窦内翻性乳头状瘤(下称IP)是组织形态学介于癌组织和正常上皮组织之间的一种粘膜上皮源性肿瘤。1854年Ward首次报告,次年Billroth报告2例,其后世界各国相继报导,至今已近千例,故本病并非少见,其发病率约占鼻和鼻窦肿瘤的0.4～4.7%。病名紊乱,不下20多种,有鼻上皮乳头状瘤、乳头状鼻窦炎、移行细胞乳头状瘤、软性乳头状瘤、内翻性上皮增生、良性移行细胞生长、内翻性乳头状瘤、内翻性Schneiderian乳头状瘤和乳头状呼吸上皮癌等,其中以“内翻性乳头状瘤”应用最广。IP来源于外胚层。Geschi ckt er认为鼻腔鼻窦 Nasal and paranasal sinuses Inverted papilloma (IP) is a mucosal epithelial-derived neoplasm whose histomorphology is between cancerous tissue and normal epithelial tissue. In 1854 Ward first reported that Billroth had reported 2 cases the following year. Since then, countries around the world have reported that there have been nearly a thousand cases so far, so this disease is not uncommon, and its incidence rate accounts for 0.4 to 4.7% of nasal and sinus tumors. Disorders of the disease, no less than 20 kinds, there are nasal epithelial papilloma, papillary sinusitis, transitional cell papilloma, soft papilloma, inverting epithelial hyperplasia, benign transitional cell growth, inverted papilloma, Inverted Schneiderian papilloma and papillary respiratory epithelial cancer, of which “inverted papilloma” is the most widely used. IP is derived from the ectoderm. Geschi ckt er thinks nasal sinuses