What is a tumour (also spelt 'tumor')?

A tumour is an abnormal mass of cells that forms when a group of cells undergo uncontrolled growth and division.

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What are the two types of tumours?

Benign and malignant.

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What is a benign tumour?

Benign tumours are growths of abnormal cells that are contained in one area, usually within a membrane. They do not invade other parts of the body. They are NOT considered cancers. 

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What is a malignant tumour?

Malignant tumour cells are cancers. They invade neighbouring tissues and spread to different parts of the body via the blood, where they form secondary tumours.

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Which types of cancer does the BRCA gene increase the risk of?

Ovarian cancer  and breast cancer.

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Which type of cancer does ultraviolet radiation increase the risk of?

Skin cancer.

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Which types of cancer does smoking increase the risk of?

  1. Lung.
  2. Mouth.
  3. Stomach.
  4. Breast.

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What type of division do tumour cells divide by?

Mitosis.

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