title: My total prostate-specific antigen (PSA) level is 0.2 nanograms per milliliter, which I'm told is normal. But my free-to-total PSA ratio is 8 percent, which I've read indicates a high risk of prostate cancer. What do these seemingly contradictory PSA results mean?
authors.affiliation: University of Colorado, Health Sciences Center, Aurora, Colorado, USA.
authors.forename: E David
authors.initials: ED
authors.lastname: Crawford
mesh_terms: D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D008297:Male; D011336:Probability; D017430:Prostate-Specific Antigen / Q000097:blood*; D012016:Reference Values
chemical_list: D017430:Prostate-Specific Antigen