The Signs of HPV
Certain types of HPV may cause warts, or papillomas,
which are benign (noncancerous) tumors.
All warts are caused by papillomaviruses, but each type of HPV grows only on specific areas of the body. The HPV types that cause the common warts that grow on hands and feet are not transmitted sexually and differ from those that cause growths in the mouth and genital area.
About 40 types of HPV can be sexually transmitted and infect the genital area, including the cervix, vagina, vulva, anus and penis. HPV is, in fact, one of the most common sexually transmitted diseases, with many millions of new genital HPV infections occurring each year in the United States. As HPV rarely causes symptoms and therefore the majority of infections are unnoticed, genital HPV infections are likely to be even more common than we think.
Most genital warts are caused by HPV types 6 and 11. Warts may appear within several weeks or months after sexual contact with a person who has HPV, or they may never appear. HPVs may also cause flat, abnormal growths in the genital area and on the cervix. Again, HPV infections often do not cause any symptoms.
HPV Types and Their Association with Cancer
Research has clearly shown that HPVs are the major cause of cervical cancer. Studies also suggest that HPVs may cause a fraction of the cancers of the anus, vulva, vagina, and penis, and some cancers of the oropharynx (the middle part of the throat that includes the soft palate, the base of the tongue, and the tonsils).
Some types of HPVs are referred to as "low-risk" viruses because they rarely develop into cancer; these include HPV-6 and HPV-11, although the most common low-risk types cause neither warts nor cancer. HPVs that can lead to the development of cancer are referred to as "high-risk." Both high-risk and low-risk types of HPVs can cause the growth of abnormal cells, but usually only the high-risk types may lead to cancer.Sexually transmitted, high-risk HPVs have been linked with anogenital cancer in
both men and women, and include HPV types 16, 18, 31, 33, 39, 45, 51, 52, 56,
58, 59, 68 and 69.
These high-risk types of HPVs cause growths that are usually flat, as compared with the warts caused by HPV-6 and HPV-11.
women health
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