Biology of Cancer: Mechanisms, Targets and TherapeuticsAbout This Hardback A cell is the structure which performs all the processes that are necessary to sustain life. Cells reproduce through a complex process called cell division. A cell can grow out of control and turn into a cancerous cell. These uncontrolled cells ignore signals to stop dividing, and spread to other areas of the body. This defect is due to several genetic changes in the cell. The gene mutations allow the abnormal cells to invade