PR MICHEL BRAUNER, ISM / SCIENCE PHOTO LIBRARY PR MICHEL BRAUNER, ISM / SCIENCE PHOTO LIBRARY
Lung cancer. Computed tomography (CT) scan of the chest of a male patient with adenocarcinoma of the lung. A malignant (cancerous) tumour (grey) is seen in the lower left lung (at right). Adenocarcinomas arise from the lining (epithelium) of the lung. Lung cancers are usually caused by tobacco smoking, and are fatal unless caught early.
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