Objective To investigate effect of neovascularization and glycosylation of ceramide on malignant transformation from precancerous lesion, benign nasal inverted papilloma (NIP) to cancer.

• 目的：探讨癌前病变鼻内翻性乳头状瘤（Nasal Inverted Papilloma, NIP）从良性肿瘤向恶性转变过程中新生血管情况以及神经酰胺糖基化的作用。