DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Kaposi's sarcoma. Light micrograph of a section through the capsule of a lymph node of an AIDS patient, showing tumours caused by Kaposi's sarcoma. 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 skin cancer. In AIDS it often spreads to other tissues, for example the lymph nodes, 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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