DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Lung cancer. Chest X-ray of a lung cancer (centre right) in a patient's left lung. The rib cage and the heart (lower right) are seen. Lung cancers are most often caused by cigarette smoking, exposure to asbestos, and pollution. Treatment includes radiotherapy, chemotherapy, and the surgical removal of all or part of the affected lung.
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