4.2.2.7 cancer

• What is a cancer?

  Uncontrolled growth and division of abnormal cells
• what are benign tumours?

  growths of abnormal cells which are contained in one area, usually within a membrane - they don’t invade other parts of the body
• what are malignant tumours?

  cancers - they invade neighbouring tissues and spread to different parts of the body in the blood where they form secondary tumours
• what have scientists discovered?

  lifestyle risk factors for various types of cancer
• what other kind of risk factors are there for cancers?

  genetic