SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Lymphoma cancer in the brain, coloured magnetic resonance imaging (MRI) scan. The cancer is seen as the white area at lower left. Lymphoma is a cancer of the lymphatic system, part of the immune system. In lymphoma, lymphocyte white blood cells become cancerous, dividing rapidly and failing to perform their immunological function. In the brain, the growth of cancerous lymphatic tissue can put pressure on surrounding structures, which can cause symptoms ranging from dizziness to slurred speech and paralysis. If the cancer is localised in one region then surgical removal is possible. As the lymphatic system permeates the body, however, the cancer often spreads widely.
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