外阴癌占女性所有生殖道原发性恶性肿瘤的3%~5%。主要发生于绝经后妇女,发生率随着年龄的增长而增加。90%为鳞状细胞癌,其余为恶性黑色素瘤、巴氏腺癌、Paget病、基底细胞癌、疣状癌、肉瘤等。此外,尚有为数不少的转移癌。大多数鳞癌发生于大阴唇,也可发生于小阴唇、阴蒂和会阴 Vulvar cancer accounts for 3% ~ 5% of all female primary reproductive tract malignancies. Occurs mainly in postmenopausal women, the incidence increases with age. 90% of squamous cell carcinoma, the rest of malignant melanoma, Pasteur, Paget’s disease, basal cell carcinoma, verrucous carcinoma, sarcoma and so on. In addition, there are a large number of metastatic cancers. The majority of squamous cell carcinomas occur in the labia majora and may also occur in labia minora, clitoris, and perineum