CENTRE JEAN PERRIN, ISM / SCIENCE PHOTO LIBRARY CENTRE JEAN PERRIN, ISM / SCIENCE PHOTO LIBRARY
Breast cancer treatment. Combined coloured computed tomography (CT) and positron emission tomography (PET) scan of sections through the chest of a female patient, showing a malignant (cancerous) adenocarcinoma (tumour, at intersection of red lines) in the right breast (left), before (top) and after (bottom) chemotherapy. The cancerous tumour can be seen to have disappeared in the lower image. Breast cancer is the most common cancer in women. It can be treated by excision of the tumour if it is caught early. Radiotherapy and chemotherapy are often used as well as surgery to prevent the tumour from regrowing.
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