CERVICAL INTRAEPITHELIAL NEOPLASIA

abnormal growth of cells of the uterine cervix, suggesting an early stage of cervical cancer. Human papillomavirus (HPV) and HIV infection are associated with an increased risk of CIN. There are 3 grades of severity: CIN I, CIN II and CIN III. A newer classification system divides these 3 classes into 2 categories: low-grade and high-grade squamous intraepithelial lesion (SIL). See also cervical dysplasia, squamous intraepithelial lesion.