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More than 100 different types of HPV exist, most of which are harmless. About 30 types are spread through sexual contact and are classified as either low risk or high risk.
Some types of HPV cause genital warts--single or multiple bumps that appear in the genital areas of men and women including the vagina, cervix, vulva (area outside of the vagina), penis, and rectum. These are considered low-risk types.
High-risk types of HPV may cause abnormal Pap smear results. They could lead to cancers of the cervix, vulva, vagina, anus, or penis.
Last Updated February 07, 2007