How does HPV cause cervical cancer?
Answers from Shannon K. Laughlin-Tommaso, M.D.
When women are exposed to genital human papillomavirus (HPV), their immune systems usually prevent the virus from doing serious harm. But in a small number of women, the virus survives for years. Eventually, the virus can lead to the conversion of normal cells on the surface of the cervix into cancerous cells.
At first, cells may only show signs of a viral infection. Eventually, the cells may develop precancerous changes. This is known as cervical intraepithelial neoplasia, which usually goes away spontaneously, but in some cases may progress to invasive cervical cancer.
It's not clear why some women are more likely to develop cervical cancer. Some types of HPV are simply more aggressive than are others. Cigarette smoking, being overweight, and long-term use of oral contraceptives also increase the risk of cervical cancer.
There are three HPV vaccines available — Cervarix, Gardasil and Gardasil 9. They offer protection from several of the most dangerous types of HPV.
If you're sexually active, the best way to prevent HPV and other sexually transmitted infections is to remain in a mutually monogamous relationship with an uninfected partner. Otherwise, when you have sexual intercourse always have your partner use a condom. Regular cervical screening is important, too.
With
Shannon K. Laughlin-Tommaso, M.D.
Aug. 24, 2016
- Palefsky JM, et al. Virology of human papillomavirus infections and the link to cancer. http://www.uptodate.com/home. Accessed July 22, 2016.
- Holschneider CH. Cervical intraepithelial neoplasia: Terminology, incidence, pathogenesis, and prevention. http://www.uptodate.com/home. Accessed July 22, 2016.
- Cervical cancer prevention. National Cancer Institute. http://www.cancer.gov/types/cervical/patient/cervical-prevention-pdq. Accessed July 22, 2016.
- Cox TJ, et al. Recommendations for the use of human papillomavirus vaccines. http://www.uptodate.com/home. Accessed July 22, 2016.
- Cervical cancer prevention and early detection. American Cancer Society. http://www.cancer.org/cancer/cervicalcancer/moreinformation/cervicalcancerpreventionandearlydetection/index. July 22, 2016.
- Gardasil (prescribing information). Whitehouse Station, N.J.: Merck & Co. Inc.; 2015. http://www.merck.com/product/vaccines/home.html. Accessed July 22, 2016.
- Cervarix (prescribing information). Research Triangle Park, N.C.: GlaxoSmithKline; 2016. https://www.gsksource.com/cervarix. Accessed July 22, 2016.
- Gay CL, et al. Prevention of sexually transmitted infections. http://www.uptodate.com/home. Accessed July 22, 2016.
- Palefsky JM. Epidemiology of human papillomavirus infections. http://www.uptodate.com/home. Accessed July 22, 2016.
- Gardasil 9 (prescribing information). Whitehouse Station, N.J.: Merck & Co. Inc.; 2015. http://www.merck.com/product/vaccines/home.html. Accessed July 22, 2016.
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