Alexandre Chagnon · 6 years ago
In general, laboratory tests have values that are considered "normal". This normal is calculated according to a large number of criteria, but it is built around an average. In other words, it is by measuring the PSA of a very large number of healthy men and finding the "average" that we are able to know what is normal in this test. That said, it is normal for some people to have slightly abnormal tests (for example, a PSA value that is too high) without it being problematic.