Prior vasectomy and prostate cancer are not related

Because men who have had vasectomies are already familiar with the medical system, their urologist or other physician, and the need for health maintenance accomplished through doctor visits, exams, and testing, they are far more likely than other men to go to their doctors for prostate cancer screening.

Men with prior vasectomies have more contact with their urologist than average men and are more likely to get PSA testing at the appropriate age. This increases their chances of having prostate cancer detected simply because they are being tested for it.

What it does not mean is that men with vasectomies necessarily actually have more prostate cancer, just that they are more likely to be diagnosed with prostate cancer (in other words, more likely that their prostate cancer will be found).