Cancer is a disease caused by cells with genetic errors that divide without control.
When the DNA in a cell becomes damaged it is called a Gene Mutation.
Gene Mutations (a change in a persons DNA sequence) that cause cancer can either be inherited or caused by environmental factors.
Mutagens are environmental agents that damage DNA.
Smoking and X-ray exposure are causes of gene mutation.
Cells with damaged DNA have a higher likelihood of increasing a person's risk for developing cancer.
