The specific prostate antigen, or PSA, is a blood test that helps the urologist detect any suspected prostate cancer. Unfortunately, there is no limit, a definite PSA value above which we can safely say that there is a high probability of prostate cancer and proceed with a biopsy. The PSA also can be increased by infections and inflammation of the prostate. For this reason, only the Urologist can, in combination with the digital examination of the prostate and the MRI scan of the prostate decide whether the patient should have further investigation to exclude or confirm the presence of prostate cancer.