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Tumour is caused by various causes, cancer can cuses tumours. Tumours are caused when cells begin to divide very rapidly. The cells may then clump together to form a tumour. If the tumour remains in one place, and still has most of its original structural features, it is called benign. A benign tumour will only threaten health if it is so large that it requires to be removed.

If the cells modify themselves in such a way that they lose all orginisation, but remain in one place, it is called "in stiu cancer".

If the cells become cancerous, and begin to invade normal tissue, it is called a malignant tumour.

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15y ago
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10y ago

Cancer has a number of different causes. There are carcinogenic viruses, toxins, irritants such as asbestos fiber, and radiation, which includes ultraviolet radiation in sunlight. sunburn is a cause of malignant melanoma.

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12y ago

Tumors are formed by an abnormal growth of cells which look like a swelling.

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6y ago

radiation

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