There are about 13 "high-risk" sexually transmitted HPV types that can set up persistent infections and cause cancer in humans. These include types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, and 68. These HPV types can cause the development of cervical intraepithelial neoplasia (CIN), vulvar intraepithelial neoplasia (VIN), penile intraepithelial neoplasia (PIN), and/or anal intraepithelial neoplasia (AIN). Other types of papilloma virus can cause wart formation in humans