宫颈上皮内瘤样病变（英语：Cervical intraepithelial neoplasia, CIN），也称宫颈非典型增生（英语：cervical dysplasia）或宫颈间质瘤（cervical interstitial neoplasia），是宫颈不典型增生和宫颈鳞形细胞原位癌的总称，也是宫颈浸润癌的癌前期病变。宫颈上皮内瘤样病变并非癌症，也能够治疗。绝大多数的宫颈上皮内瘤样病变患者病情稳定，但是少量病例会恶化为宫颈癌。引起CIN的主要原因是人乳头瘤病毒（HPV）在宫颈部位的慢性感染，特别是高感染度的16或18型HPV。

Cervical intraepithelial neoplasia (CIN), also known as cervical dysplasia and cervical interstitial neoplasia, is the potentially premalignant transformation and abnormal growth (dysplasia) of squamous cells on the surface of the cervix. CIN is not cancer, and is usually curable. Most cases of CIN remain stable, or are eliminated by the host's immune system without intervention. However a small percentage of cases progress to become cervical cancer, usually cervical squamous cell carcinoma (SCC), if left untreated. The major cause of CIN is chronic infection of the cervix with the sexually transmitted human papillomavirus (HPV), especially the high-risk HPV types 16 or 18. Over 100 types of HPV have been identified. About a dozen of these types appear to cause cervical dysplasia and may lead to the development of cervical cancer. Other types cause warts.