Men with a PSA level above the median for their age group are at higher risk for prostate cancer. The concept of what is "normal" enters into nearly every aspect of clinical decision making. For ...

What is the PSA test? It helps determine whether you have cancer of the prostate, a walnut-sized gland enfolding the duct ...

“There were some men with high PSA who didn’t have prostate cancer, and there were some men with low PSA who did. Everybody wants a pregnancy test: They want something that when it’s positive, the ...