宫颈癌的发病率在妇科肿瘤中仅次于乳腺癌位居于第二位,世界范围内每年有近50万的新发病例。其中80%发生在发展中国家,我国约占世界新发病例的30%,世界每年约有20万妇女死于宫颈癌。由于子宫颈易于直接检视(包括肉眼观察和阴道镜检查),所以子宫颈病变是较易被发现的,“三阶梯” The incidence of cervical cancer is second only to breast cancer in gynecologic cancers, with nearly 500,000 newly diagnosed cases worldwide each year. Of these, 80% occur in developing countries, our country accounts for about 30% of new cases in the world, and about 200,000 women die of cervical cancer each year in the world. Cervical lesions are more likely to be found because of the ease of direct examination of the cervix (including macroscopic and colposcopy), and “three steps”