| Abstract: |
viruses are obligatary intracellular organisms, it is classified them according to their nucleic acid contents into either rna or dna viruses and disscussing the oncogenicity of eachvirus alone.the oncogenic skin viruses in this essay are: 1.human popilloma viruses.2.herpes viruese.3.reteroviruses. anumber of oncogenic viruses were incriminated in the pathogenesis of various tumors.the machanism by which viruses can induce these tumors varies and this variation seems to be a result of either possessing certain oncogenes and transforming proteins in the viral genomes or not clinical human papilloma virus infection of the cervix can be assocaited with dasplasis of all gardes of servrity up to invasvie cell carcinoma.
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