DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Kaposi's sarcoma. Skin plaques due to Kaposi's sarcoma on the torso of a patient with AIDS. AIDS (acquired immune deficiency syndrome) is a disease caused by the human immunodeficiency virus (HIV). It causes a gradual weakening of the immune system, making otherwise harmless infections life-threatening. Kaposi's sarcoma is a type of vascular skin cancer that forms purple nodules on the skin. In AIDS it often spreads to other tissues and can be rapidly fatal. This image was taken in Africa, where lack of access to medicine and information makes AIDS a major public health concern.
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