DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Meningioma. Magnetic resonance imaging (MRI) scan of a meningioma (light-grey, top left) in the brain a 71-year-old woman. The scan has been taken vertically through the head and the spine is at lower centre. A meningioma is a benign tumour arising from the meninges, the protective membranes that cover the brain and spinal cord. As it grows, a meningioma compresses adjacent brain tissue, and symptoms, such as headaches, are often related to this compression. Usually the tumourous growth can be removed by surgery, although sometimes radiotherapy is needed and new hormonal treatments are also being tested.
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