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Haemorrhage in lung cancer. Coloured Scanning Electron Micrograph (SEM) of alveoli air-sacs of the human lung, in a smoker with lung cancer. The thin-walled air-sacs are seen containing red blood cells. This blood has haemorrhaged from walls of the air-sacs due to damage caused by lung cancer. The patient was a heavy smoker and the affected lung had to be surgically removed. Lung cancer is one of the commonest forms of cancer, and tobacco smoking is the major cause. Symptoms include coughing blood, chest pain, wheezing. The cancer may spread to other parts of the body. Treatment includes surgery, radiotherapy and anticancer drugs. Magnification: x130 at 6x6cm size.
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