Rutholu 23:25, February 22, 2011 (UTC) CANCER RESEARCH UK
What HPV is
Human papilloma viruses are known as HPV. They can affect the skin and the moist membranes that line parts of the body, including
· The lining of the mouth and throat
· The cervix
· The anus
There are more than 100 different types (or ‘strains’) of human papilloma virus (HPV). Each type has a different number.
HPV is common. Most people have the virus at some time in their lives. For most people it causes no symptoms and goes away on its own. It is much more common in young people, probably because we develop immunity to the virus as we get older.
Some types of HPV can cause changes in the cells of the cervix or the lining of the mouth and throat. They are known as high risk HPVs. Doctors call these cell changes dysplasia. The changed cells have an increased risk of becoming cancerous.
Other types of HPV can cause warts and verrucas. These types of HPV are sometimes called the wart virus or genital wart virus and they include types 6 and 11. Warts and verrucas are most common on the hands and feet, in the genital area and around the anus. But they can be on any part of the body. Types of HPV that cause warts and verrucas do not usually cause cell changes that may develop into cancer. They are called low risk HPVs.
How you get HPV
Types of HPV that affect the skin can be passed on by skin contact with an affected person. The types of HPV that affect the mouth and throat can be passed on through kissing. Genital HPV is usually spread through intimate, skin to skin, contact during sex.
You can have the genital HPV virus for years and not have any sign of it. So it isn’t unusual to have a long term partner and then be told you have the virus after medical tests such as cervical screening. Many people then worry that their partner has been unfaithful, or will think they have been unfaithful. But finding out you have HPV doesn’t necessarily mean that you or your partner have been unfaithful. There is no way of knowing how long you have had the virus. It could be weeks, months or years.
HPV and cervical cancer
Some types of HPV can increase the risk of developing cervical cancer, particularly types 16, 18, 31, 33 and 45. They are called high risk types. Almost all women with cervical cancer have at least one of these types of HPV in the cells of their cervix.
Of the different types of HPV, types 16 and 18 cause about 7 out of 10 (70%) cancers of the cervix. The other types cause most of the remaining 30% of cervical cancers.
Do remember that most women with high risk HPV don’t develop cervical cancer. We know from research that other factors affect whether you develop a cancer, such as how well your immune system is working or whether you smoke. Women who smoke and have a high risk type of HPV infection are more likely to go on to get cervical cancer.
Remember that regular cervical screening will pick up abnormal cervical cells before they become cancerous. So even if you have HPV and smoke, you can prevent cervical cancer if you go for screening when you are invited.
People with low immunity also have an increased risk of cervical cancer. Your immunity may be low because you take certain medicines for another condition, or because you have an illness that affects your immunity, such as HIV or AIDS. If you have low immunity, it is particularly important to have regular cervical screening
Testing for cervical HPV
HPV testing will be available as part of the NHS cervical cancer screening programme from April 2011. It will be offered to women with borderline or low grade cervical changes detected in the first round of cervical screening. Women who test positive for high risk types of HPV have treatment for the abnormal cells. You may have a colposcopy straight away. In women who test negative for HPV the cell changes are likely to go back to normal on their own so they do not need treatment but will have monitoring to see whether the cervical changes have gone back to normal after a few months.
Treatment for cervical HPV
There is no treatment that can get rid of the HPV virus. The body normally clears the virus from the body on its own after some time. But treatment can get rid of any visible signs of HPV infection, such as warts. Treatment can also get rid of changes in the cervical cells that may develop into cancer.
Preventing cervical HPV infection
Using a condom can help lower your risk of genital HPV but won’t prevent it completely. The virus can be spread through contact with the skin around the genital area, including contact with the vulva and the scrotum.
Vaccines are now available to prevent infection with types of HPV that can lead to cervical cancer. The Gardasil and Cervarix cervical cancer vaccines were licensed in the UK in 2007. These vaccines will help to prevent this type of cancer in the future.
All girls aged 12 or 13 in the UK are offered the cervical cancer vaccine. It is up to them and their parents whether they have it. In autumn 2008, a 2 to 3 year 'catch up' campaign started in the UK to vaccinate girls between 13 and 18. This campaign has finished in most areas now.