Does leukemia is an hereditary disease?

My aunt has leukemia and the thought has ran across my mind too. Its scary to think about. But this is the information I found.. Some families will tend to see a wider occurrence of this form of cancer than other families. This would then suggest, at least to many researchers and experts, that leukemia might actually be hereditary, making those individuals with family members suffering from the disease at a greater risk than most. You can take precautions avoiding high doses of radiation, exposure to the chemical benzene, smoking and other tobacco use. Just make sure to keep regular check ups with your doctor.