The biggest problem with the range between 4 and 10 is being a gray area because with age it is normal to increase the gland development or have a controlled and normal growth of the prostate due to benign prostatic hypertrophy; but, on the other hand, this increase could be due to tumor development.<\/p>\n

That is why the free PSA\/total PSA ratio detects 95% of prostate cancer cases, being one of the tests used to screen for prostate cancer, which, derived from the result, medical intervention and complementary tests will be required to confirm the diagnosis.<\/p>\n

It must be remembered that there is biological variability in each person, this means that there are variations in the levels of chemical substances circulating in our blood, including prostate antigen, due to this, the results must be interpreted by a doctor, to correlate and integrate important information for an adequate diagnosis, timely follow-up and correct treatment.<\/p>\n

To perform the prostate antigen test, a blood sample will be taken that will allow the free PSA and the total PSA to be known individually or together. But there are certain restrictions before taking the sample to achieve an adequate measurement. These include not having sexual intercourse for two or three days before going to the lab, avoiding anal sexual stimulation or instrumental or non-instrumental examinations, and, in case of suffering from a prostatic infection, treatment must first be completed before the screening.<\/p>\n