Japanese men, whether overweight or slim, have a similar chance of developing prostate cancer, a health ministry research team reported Sunday in a finding that conflicts with U.S. and European studies, which mainly blame obesity for the prevalence of the disease.

The incidence of prostate cancer in both Europe and the United States is nearly 10 times as high as that in Japan. The latest study suggests Japanese patients might be more affected by other factors, including dietary habits or hormone concentration.

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