2) Chromosome damage rare genetic syndromes which put people at a higher risk.
3) Immune system deficiencies-People are more at risk when they have a decreased ability to resist foreign cells.
4) Downs syndrome--children born with Downs are twenty times more likely to develop acute leukemia.
5) Chronic Myelogenous leukemia-a chromosomal disorder. The Philadelphia Chromosome hooks up to a different chromosome than it is supposed to be making the body unable to know when to stop producing white blood cells.