What causes cancer in cells?
The fundamental abnormality resulting in the development of cancer is the continual unregulated proliferation of cancer cells. Rather than responding appropriately to the signals that control the normal cell behaviour, cancer cells grow and divide in an uncontrolled manner. They invade normal tissues and organs , eventually spreading through out the body .
Cancer cells typically display abnormalities in the mechanisms that regulate normal cell proliferation , differentiation and survival .
Taken together these characteristic properties of cancer cells provide a description of malignancy at the cellular level.