90%的子宫颈癌为扁平上皮癌。既往认为,子宫颈癌从上皮内癌Ⅰ级(CIN_1)发展到上皮内癌Ⅲ级(CIN_3)约需4～7年,从 CIN_3到浸润癌约需10～15年。但最近的资料表明,从子宫颈癌患者以往的细胞学诊断看,多数在诊断为子宫颈癌2～5年之前,其细胞学诊断确实为阴性,故认为有的癌可在短期内发展形成。这类癌多发生在性生活频繁且有高危因素的年轻妇女中,但是最近在低危组非贫困的妇女中 90% of cervical cancer is squamous cell carcinoma. Previously, cervical cancer from epithelial carcinoid grade Ⅰ (CIN_1) to intraepithelial neoplasia grade Ⅲ (CIN_3) takes about 4 to 7 years, from CIN_3 to invasive cancer takes about 10 to 15 years. However, recent data show that from the previous cytological diagnosis of cervical cancer patients, most of the diagnosis of cervical cancer 2 to 5 years ago, the cytology diagnosis is indeed negative, so that some cancer can develop in the short term . This type of cancer occurs mostly in young women who have frequent and high-risk sexual lives, but recently among non-poor women in the low-risk group