Almost 40 years have passed since the first case of what is known as AIDS was documented. In these 40 years, AIDS has always been a research challenge and hot spot. Researchers and scientists have made tremendous progress in basic and clinical research on HIV. In particular, the widespread use of antiretroviral therapy (ART) has made it less of a deadly disease today and more of a manageable one. In the post- ART era when ART can significantly improve the immunity of people living with HIV (PLWH) and extend their life, the incidence of non-AIDS-defined cancers is greatly increased. Factors related to immunosuppression do not seem to explain this problem sufficiently. This suggests that besides immunosuppression, there are other mechanisms that may also contribute to the increased incidence of cancer in PLWH. Here, we summarized and discussed four possible mechanisms for the increased incidence of cancers in PLWH: immunosuppression, oncogenic viral infection, chronic infection, inflammatory damage, and the direct impact of HIV.
Keywords: Chronic inflammation; HIV; Immunodeficiency; Malignancy; Virus infection.