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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.
High-risk HPVs cause cancer and consist of about twelve identified types. [10] Types 16 and 18 are responsible for causing most of HPV-caused cancers. These high-risk HPVs cause 5% of the cancers in the world. In the United States, high-risk HPVs cause 3% of all cancer cases in women and 2% in men. [87]
Human papillomavirus (HPV) infection is a cause of nearly all cases of cervical cancer. [6] Most women will successfully clear HPV infections within 18 months. Those that have a prolonged infection with a high-risk type (e.g. types 16, 18, 31, 45) are more likely to develop Cervical Intraepithelial Neoplasia, due to the effects that HPV has on ...
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.
Endocervical adenocarcinoma represents 20–25% of the histological types of cervical carcinoma. Gastric-type mucinous adenocarcinoma of the cervix is a rare type of cancer with aggressive behavior. This type of malignancy is not related to high-risk human papillomavirus (HPV). [76]
Gardasil is an HPV vaccine for use in the prevention of certain strains of human papillomavirus (HPV). [10] [7] [8] [9] [11] It was developed by Merck & Co. [12] High-risk human papilloma virus (hr-HPV) genital infection is the most common sexually transmitted infection among women. [13]
An increased risk of HPV+OPC is observed more than 15 years after HPV exposure, [8] pointing to a slow development of the disease, similar to that seen in cervical cancer. Relative to HPV-OPC, the oncogenic molecular progression of HPV+OPC is poorly understood. [28] The two main viral oncoproteins of the high risk
Pap tests can usually be performed during pregnancy up to at least 24 weeks of gestational age. [34] Pap tests during pregnancy have not been associated with increased risk of miscarriage. [34] An inflammatory component is commonly seen on Pap smears from pregnant women [35] and does not appear to be a risk for subsequent preterm birth. [36]