What is Cancer and Cancer Symptoms

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How cancer cells divide and develop a cancer.When normal cells are damaged beyond repair, they are eliminated by apoptosis (A). Cancer cells avoid apoptosis and continue to multiply in an unregulated manner (B).

What is Cancer?

Cancer is a group of more than 100 related diseases that occur when abnormal cells divide and destroy surrounding tissues. It can begin in any organ or tissue of the body. When cells keep dividing, the result is a mass of cells called a tumour. Benign tumours do not spread to other parts of the body, while malignant tumours do spread cancer to other body parts.

They eventually crowd out nearby normal cells and disrupt their function. The cause of most cancers is not fully understood. However, a combination of genetics and environmental factors usually contributes to the transformation of cells from normal to cancerous. Cancer may take years to develop.

Cancer Symptoms

The earlier cancer is detected, the more likely it is to be treated successfully.


  • obvious change in a wart or mole
  • change in bowel or bladder habits
  • any sore or cut that does not heal
  • indigestion or difficulty swallowing
  • nagging cough or hoarseness
  • unusual bleeding or discharge
  • weight loss for no apparent reason
  • thickening or lump in the breast or elsewhere in the body
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