title: Viruses as an etiologic factor in cancer.
mesh_terms: D000256:Adenoviridae; D001355:Alpharetrovirus; D000818:Animals; D001717:Birds; D002471:Cell Transformation, Neoplastic; D003587:Cytomegalovirus; D004267:DNA Viruses; D006564:Herpesviridae; D007913:Herpesvirus 1, Ranid; D004854:Herpesvirus 4, Human; D006801:Humans; D005256:Leukemia Virus, Feline; D009052:Leukemia Virus, Murine; D008324:Mammary Tumor Virus, Mouse; D008380:Marek Disease / Q000382:microbiology; D009374:Neoplasms, Experimental / Q000209:etiology*; D009858:Oncogenic Viruses; D027383:Papillomaviridae; D027382:Polyomaviridae; D012328:RNA Viruses; D012190:Retroviridae; D009053:Sarcoma Viruses, Murine; D018139:Simplexvirus