SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Lung cancer. Coloured chest X-ray showing a cancer (green circle) in the lung at right. Bones of the spine (down centre), ribs (around lungs) and clavicles, or collarbones (stretching from upper left and right), are light green. Lung cancer is a very common type of primary malignant tumour. It is more common in men than women and is linked to cigarette smoking. There are several types of lung cancer, the most common being squamous cell carcinoma, adenocarcinoma and large cell carcinoma. Generally, it is not possible to identify the type of cancer from an X-ray alone. If the cancer is diagnosed at an early stage, all or part of the lung can be surgically removed.
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