Lung Cancer: Malignant Tumors

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The issue being investigated is lung cancer.

Lung cancer occurs when abnormal cells in one or both lungs grow in an uncontrolled way and form a mass called a neoplasm or tumour. The lungs are the main organs of the respiratory system located in the chest cavity on either side of the heart. Lung cancer can originate anywhere in the lungs. Tumours can be benign (not cancerous) or malignant (cancerous). Benign tumours do not spread to other parts of the body, although they may interfere with other areas of the body as they grow. They may come up as nodules or a ‘spot on the lung’ in an x-ray. A malignant tumour is characterised by its ability to spread to other parts of the body through a process known as metastasis. If the spread is not stopped,
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