Acquired Immunodeficiency Syndrome (AIDS) is a condition caused by the Human Immunodeficiency Virus (HIV). This virus attacks the immune system, specifically CD4 cells (T cells), making the body more vulnerable to infections and certain types of cancer. People with AIDS have a significantly higher risk of developing cancers such as Kaposi's sarcoma, non-Hodgkin lymphoma, and invasive cervical cancer. The weakened immune system is less capable of fighting off cancer cells, contributing to a higher incidence of these malignancies.