Cancer is a dangerous disease.It is a large and complex family of malignancies that can affect virtually every organ in the body of human . Cancer kills one out of every four out of hundred in the world, surpassed only by heart disease as the leading cause of death in this country. Over 2 million new cases are diagnosed every year, with half of them occurring in the breast,lung, prostate, colon and rectum. Cancer can strike at any age, although it is most common in people over 45.
There are around 180 different types of cancer. Two in five people, at some point in their lives, are susceptible to it. Cancer is the term given to a large group of diseases that vary in type and location. It is the result of a continuous, abnormal and relatively autonomous cell proliferation, which is due to the permanent alteration of some cells that gets transmitted to the cell family. It is a disease caused by the loss of control over a cell's reproduction capacity. Rather than dividing in a controlled and programed manner, the cell continues to divide and multiply abnormally, until a detectable lump or tumor develops.
Both external and internal factors cause cancer. Factors such as chemicals, radiation, viruses, hormones and inherited mutations may act together to start or further cancer. eight or more years may pass between exposure and detectable cancer.
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