what type of cancer does viruses cause
An oncovirus is a virus that can cause cancer. This term originated from studies of acutely transforming retroviruses in the 1950â60s, often called oncornaviruses to denote their RNA virus origin. It now refers to any virus with a DNA or RNA genome causing cancer and is synonymous with tumor virus or cancer virus..The vast majority of human and animal viruses do not cause cancer, probably because of longstanding co-evolution between the virus and its host.t now refers to any virus with a DNA or RNA genome causing cancer and is synonymous with tumor virus or cancer virus.. The vast majority of human and animal viruses do not cause cancer, probably because of longstanding co-evolution between the virus and its host.
Other viruses can also cause hepatitis (hepatitis A virus, for example), but only HBV and HCV can cause the long-term (chronic) infections that increase a personâs chance of liver cancer. In the United States, less than half of liver cancers are linked to HBV or HCV infection.iruses that can lead to cancer. Viruses are very small organisms; most canât even be seen with an ordinary microscope. They are made up of a small number of genes in the form of DNA or RNA surrounded by a protein coating.
Vulvar cancer. HPV can also cause cancer of the vulva, which is the outer or external part of the female genital organs. Nearly 7 out of 10 vulvar cancers and almost all vulvar pre-cancers are linked to infection with the high-risk HPV types.This is a much less common cancer than cervical cancer.hese types are called âhigh-riskâ because they can cause cancer. Doctors worry more about the cell changes and pre-cancers linked to these types, because they are more likely to grow into cancers over time. Common high-risk HPV types include HPV 16 and 18.