Adult Weight Gain Tied to Prostate Cancer Risk

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Genes and lifestyle may account for these differences in risk, Hernandez speculated. "The relationship of certain characteristics, such as body size, with cancer risk may vary across ethnic groups due to the combined influence of both genes and lifestyle," she said. "This study underscores the importance of investigating cancer etiology in diverse populations."

Victoria Stevens, strategic director of laboratory services at the American Cancer Society, said the study shows there are differences in ethnic groups, but these differences are not straightfoward.

"Their findings aren't definitive," Stevens said. "They are just not clear-cut, you don't see a simple linear relationship."

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"The paper is very suggestive, but it is not clear in prostate cancer whether weight gain is as important" as it is for other malignancies, she said. "Exactly what that risk is, we still don't know."

More information

For more information on prostate cancer, visit the American Cancer Society.

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