Prostate psa normal values

Prostate PSA includes two items: total PSA and free PSA. Total PSA has a normal value, ranging from 0-4ng/mL, while free PSA has no normal value. Under normal circumstances, these two indicators are used to screen prostate cancer, that is, prostate cancer, and these two indicators should be taken at the same time. If the total PSA value is below 4ng/ml, combined with imaging examination, there is no problem, generally do not consider prostate cancer. If total PSA is above 10ng/mL, prostate biopsy is recommended regardless of imaging findings, because prostate cancer is likely to be present in approximately 50% of patients with total PSA above 10ng/mL. If the total PSA value is between 4-10ng/ml, then it is necessary to refer to the free PSA value, generally refer to the ratio of the two, that is, the ratio of free PSA to total PSA, 0.16 is the recommended normal limit in China. Further, if the ratio is below 0.1, the patient's probability of prostate cancer is above 50%. If the ratio is above 0.25, the patient's probability of prostate cancer is only below 10%. Free PSA values are inversely correlated with prostate cancer. The larger this ratio, the less likely prostate cancer is.