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Cancer Risk of Migrants

Many studies have looked at changes in breast cancer rates due to migration to industrialized regions. One study observed a substantial increase in incidence of breast cancer among Asian-American women, with those who had been in the United States for the longest time having the highest rates of breast cancer. Therefore, exposure to Western lifestyles and environments may have a substantial impact on breast cancer risk during the migrant's lifetime [Ziegler et al., 1993].

A similar study has shown that although Hispanic-American women in the U.S. have higher rates of breast cancer than do immigrant Hispanic women, the rates of breast cancer increase the longer Hispanic women spend in the United States. This is especially true for women who immigrated before the age of 20 years [John et al., 2005].