Genetic testing helps estimate your chance of developing cancer in your lifetime. It does this by searching for specific changes in your genes, chromosomes, or proteins. These changes are called mutations. 
 
Genetic testing is a personal decision made for different reasons. It is also a complex decision best made after talking with your family, health care team, and genetic counselor. 
 
The results will help with diagnosis or management of a condition. For example, you may take steps to lower your risk. Steps may include, medication, frequent screening, or lifestyle changes.