infections
Human Immunodeficiency Virus (HIV) Infection
Cancers common in people with HIV infection
 Kaposi Sarcoma , a cancer caused by a sexually transmitted herpesvirus, appears as painless, red to purple, raised patches on the skin. It occurs mainly in men who have sex with men. Cancers of the immune system (lymphomas, typically Non-Hodgkin Lymphomas ) may develop, sometimes first appearing in the brain. When the brain is affected, these cancers can cause weakness of an arm or a leg, headache, confusion, or personality changes. Having AIDS increases the risk of other cancers. They include cancer of the cervix, anus, testes, and lungs as well as melanoma and other skin cancers. Men who have sex with men are prone to developing cancer of the rectum due to the same Human Papillomavirus (HPV) Infection (HPV) that cause cancer of the cervix in women. 