Who has a higher risk for prostate cancer?

The correct answer highlights that men with an affected brother have a higher risk for developing prostate cancer. This relationship is rooted in genetic predisposition; having a first-degree relative, particularly a brother, with prostate cancer significantly increases a man's risk of developing the disease himself.

When prostate cancer occurs in first-degree relatives, it indicates a stronger familial link, often due to shared genetic factors. Brothers share approximately 50% of their genes, so if one brother has prostate cancer, the second brother may also have inherited susceptibility genes that increase his risk.

While having affected relatives (such as sisters or mothers) can indicate some familial risk, the direct male-to-male transmission of risk, particularly between brothers, is more pronounced. Therefore, this connection significantly elevates the likelihood of developing prostate cancer compared to men who do not have any family history of the disease.