A PSA blood test can help find prostate cancer, but experts often disagree on who needs one and what the results actually mean.

Add Yahoo as a preferred source to see more of our stories on Google. PSA stands for prostate-specific antigen, a substance naturally produced in prostate tissue. A small amount of PSA regularly ...

New data with longer-term follow-up suggest that PSA screening probably lowers prostate cancer mortality — but experts stress ...