The Psa blood test is commonly used to detect prostate cancer in men. However, there are various synonymous terms used to refer to this test in medical terminologies. Some of these words include the prostate-specific antigen test, prostate antigen test, PSA screening test, and PSA blood assay. Additionally, the PSA test can also be referred to as the prostate cancer blood test, prostate screening blood test, and prostate biomarker test. Essentially, all these words are used to refer to the same laboratory test used in the detection of prostate cancer in men. The Psa blood test remains an essential screening tool for prostate cancer in men, and early detection remains critical in improving patient outcomes.