What is cancer?
Cancer is the general term used for diseases in which normal cells separate without any control thus involving other tissues. Cancer cells can also spread to various parts of the body through the blood and lymph system.
Wild cell growth turns into cancer when it is exposed to carcinogens (Cancer- causing substance) genetic defects, or viruses. A tumour is formed when cancer cells multiply large masses of tissue. In some cases tumours limit themselves to one spot in the body; some can be removed by surgery. These kinds of tumours may cause little harm and is termed benign. Hostile tumours are called malignant. The study of cancer is called oncology.
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