Among the chemical agents employed to treat CIN, several antineoplastic drugs can be identified; some of them applied as a first line (primary) treatment, and others as adjuvants, such as, 5-fluorouracil (5-FU), mitomycin C (MMC) and interferon alpha 2b (IFNα2b) [8]. Here, IFNA2 is linked to cervical squamous intraepithelial neoplasia.