A toxin is a substance that can injure or kill cells. Chromosomal aberrations- damage to part of the chromosome that results in death of the cell. Many of these factors may have no or unknown thresholds. Cancer Cancer is a number of diseases causing cells to undergo uncontrolled proliferation causing interference with bodily functions and eventual death of the organism. They lead to a breakdown in cell communication used to restrict the growth of neoplasms.
Cells break off and form new colonies.