In this book, leading experts examine the clinical and biological aspects of viruses known to play a role in the oncogenesis of AIDS-associated cancers and non-AIDS-defining malignancies more commonly observed in HIV-infected individuals. Among the malignancies considered are those associated with Kaposi sarcoma-associated herpesvirus (KSHV) or Epstein Barr virus (EBV), Merkel cell carcinoma due to Merkel cell polyomavirus (MCPyV), human papillomavirus (HPV)-associated anogenital and oropharyngeal cancers, and hepatitis B and C virus (HBV/HCV)-associated liver cancers. It also provides detailed information on the molecular biology of the causative viral agents and guidance on the specific treatment required in this special population.