<prompt> Answer this question truthfullyWhat is cervical intraepithelial neoplasia CIN and what are some of the factors that commonly contribute to its development?  <response>: <reason> Cervical intraepithelial neoplasia CIN is a dysplastic pre-cancerous lesion of the cervix that commonly manifests following the loss of the tumor suppressors p53 and Rb following HPV infection. 