How does cancer develop?

All cancers begin in cells, the body's basic unit of life. To understand cancer, it's helpful to know what happens when normal cells become cancer cells.

The body is made up of many types of cells. These cells grow and divide in a controlled way to produce more cells as they are needed to keep the body healthy. When cells become old or damaged, they die and are replaced with new cells.

But sometimes this orderly process goes wrong. The genetic material (DNA) of a cell can become damaged or changed, producing mutations that affect normal cell growth and division. When this happens, cells do not die when they should and new cells form when the body does not need them. The extra cells may form a mass of tissue called a tumor.

Not all tumors are cancerous; tumors can be benign or malignant. Benign tumors aren't cancerous. They can often be removed, and, in most cases, they do not come back. Cells in benign tumors do not spread to other parts of the body. Malignant tumors are cancerous. Cells in these tumors can invade nearby tissues and spread to other parts of the body. The spread of cancer from one part of the body to another is called metastasis.

Most cancers are named for the organ or type of cell in which they begin. For example, cancer that begins in the stomach is called stomach cancer. Some cancers do not form tumors. For example, leukemia is a cancer of the bone marrow and blood.

The reasons for the cancer cells to develop includes congenital, food intake,life style, environment, mental stress, lack of selenium in the body and so on.

Updated on 08.08.2013

The above possible causes of cancers are based on medical experts' knowledge and experience for decades.
But after revelations by "Living Buddha" Master Lu from Australia about the REAL causes of cancer diseases with 100% accuracy (not even 99% accuracy) during the Dharma Door Q & A sessions with the followers, the above medical experts' opinions on possible causes  became very doubtful !