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Epidemic Kaposi's sarcoma. Coloured frontal chest X-ray of the lungs of a patient with tumours (blue, centre left and right) indicating advanced stage epidemic Kaposi's sarcoma (KS). Epidemic KS is a cancer that usually affects men with AIDS (acquired immunodeficiency syndrome). It involves the development of tiny blood vessels (angiogensis) and is thought to be partly caused by a herpes virus, Human Herpes Virus-8 (HHV-8). Epidemic KS mainly appears as lesions on the skin, but it may spread (metastasise) to other internal organs. Treatment involves combinations of anti- cancer drugs, although prognosis is poor once the cancer has spread to the lungs.
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