What Is Cancer?

In simple terms, cancer is an abnormal growth of body cells. Each one of us is born with a potential for cancer. One can not "Catch" it as one would an infection or a cold. When the programming of a cell or a group of cells is affected, growth may become uncontrolled. Some of the factors that can alter the code are chronic irritation, tobacco, smoke and dust, radioactive substances, age, sex, race and heredity. While one cannot control many of these factors, we need to be aware of the ones we can control of. Prevention is definitely better than the treatment of cancer. No one yet talks of a cure or treatment:

What is the difference between normal and malignant cells?

Normal cells grow in a well-regulated pattern. When cancer sets in, a group of cells suddenly starts multiplying in a haphazard and uncontrolled way, forming lumps or tumours. a malignant tumour never stops growing and can spread to other parts of the body.

Broadly, There are 19 cancers that can be generally related to lifestyle.