LEUKIMIA RISK FACTORS part2

Family history is one of the strongest risk factors for CLL. Cigarette smoking is a risk factor for AML, and there is limited evidence that parental smoking and maternal exposure to paint increases the risk of childhood leukemia. Exposure to certain chemicals, such as formaldehyde and benzene (a component in cigarette smoke and gasoline that has become more regulated due to its carcinogenicity), also increases risk of AML. Infection with human T-cell leukemia virus type I (HTLV-I) can cause a rare type of leukemia called adult T-cell leukemia/lymphoma. The prevalence of HTLV-I infection is geographically localized and is most common in southern Japan and the Caribbean;infected individuals in the US tend to be descendants or immigrants from endemic regions.source: American Cancer Society. Cancer Facts & Figures 2013. Atlanta: American Cancer Society; 2013.