To split cells into cancer cells, have gradually, without control, control mechanisms, there are abnormal cells split. Normally, the genes that control the cell split into two groups:
The cancer cells Cells divide indefinitely By uncontrolled cell division that control mechanisms are defective. Normally, the gene that controls cell division is divided into two groups.
The cancer cells divide go on without control, then the mechanism of control of cell division and malfunction. Usually the genes controlling cell division is divided into 2 groups.