ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Lung cancer. Coloured X-ray showing cancer in the left lung of a 55-year-old patient. The cancer is seen here as the opaque round mass at right of the spine (bright column running down centre). The main cause of lung cancer is inhaling cigarette smoke. Symptoms of this type of cancer include chest pain, shortness of breath and a persistent cough. Treatment is with a combination of chemotherapy and radiotherapy.
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