This seems rather counterintuitive. Two large studies about the PSA blood test, which is used to screen for prostate cancer, have shaken the veracity that that annual screenings should be mandatory. The "significant" and "definitive" results prove that, while the cancer test does indicate if a tumor is present, they are usually so slow-growing that many men are treated unnecessarily. Consequences of treatment range from impotence to incontinence and, overall, the tests did not lead to a reduced rate of death. Doctors are now urging men to weigh the risks and benefits of the preventative care.