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The highest rates of HPV are in younger women, with a rate of 24% in women under 25 years. [183] Rates decline in older age groups in Europe and the Americas, but less so in Africa and Asia. The rates are highest in Sub-Saharan Africa (24%) and Eastern Europe (21%) and lowest in North America (5%) and Western Asia (2%).
A 2007 survey of American women found 40% had heard of HPV infection and less than half of those knew it causes cervical cancer. [175] Over a longitudinal study from 1975 to 2000, it was found that people of lower socioeconomic census brackets had higher rates of late-stage cancer diagnosis and higher morbidity rates.
Rates are falling fastest among women in their early 20s, the first generation to benefit from HPV vaccines, which were approved in 2006. HPV, the human papillomavirus, causes six types of cancer ...
When used without context, it frequently refers to infections (squamous cell papilloma) caused by human papillomavirus (HPV), such as warts. Human papillomavirus infection is a major cause of cervical cancer , vulvar cancer , vaginal cancer , penis cancer , anal cancer , and HPV-positive oropharyngeal cancers .
The cause of CIN is chronic infection of the cervix with HPV, especially infection with high-risk HPV types 16 or 18. It is thought that the high-risk HPV infections have the ability to inactivate tumor suppressor genes such as the p53 gene and the RB gene, thus allowing the infected cells to grow unchecked and accumulate successive mutations, eventually leading to cancer.
Papillomaviridae is a family of non-enveloped DNA viruses whose members are known as papillomaviruses. [1] Several hundred species of papillomaviruses, traditionally referred to as "types", [2] have been identified infecting all carefully inspected mammals, [2] but also other vertebrates such as birds, snakes, turtles and fish.
Genital HPV infections have an estimated prevalence in the US of 10–20% and clinical manifestations in 1% of the sexually active adult population. [29] US incidence of HPV infection has increased between 1975 and 2006. [29] About 80% of those infected are between the ages of 17 and 33. [29]
This is associated with carcinogenic genotypes of HPV and/or HPV persistence factors such as cigarette smoking or immunocompromised states. Differentiated vulvar intraepithelial neoplasia also known as VIN Simplex: is associated with vulvar dermatoses such as lichen sclerosus. It is associated with atypia of the squamous epithelium. [4] [5]