Cancer is a disease of the body’s cells. The body is constantly making new cells to replace worn-out ones, to grow, or to heal itself after an injury.
Normally cells grow and reproduce themselves in an orderly way. Occasionally, however, some cells reproduce themselves in an uncontrolled way and these abnormal cells may grow into a lump that is called a tumour. Tumours can be benign (not a cancer) or malignant (a cancer).
It is important to understand that cancer is not a single disease with a single type of treatment.