Normal PSA value is ______ ng/mL.

Normal PSA value is ______ ng/mL.

• A. 1.0
• B. 2.0
• C. 4.0
• D. 6.0

Answer: (C)

PSA is a protein produced by the prostate and measured in the blood to help screen for prostate issues. The commonly cited upper limit of normal is 4 ng/mL, so 4.0 ng/mL is the threshold used to separate typical results from those that may require closer investigation. Values at or below this level are generally considered normal, while higher values raise concern for possible prostate pathology, though they can also be influenced by non-cancer factors such as prostatitis, benign prostatic hyperplasia, ejaculation, recent procedures, or infection. In ultrasound practice, a PSA near or above this threshold often leads to further evaluation with imaging and possibly biopsy, but the result by itself isn’t diagnostic.

PSA is a protein produced by the prostate and measured in the blood to help screen for prostate issues. The commonly cited upper limit of normal is 4 ng/mL, so 4.0 ng/mL is the threshold used to separate typical results from those that may require closer investigation. Values at or below this level are generally considered normal, while higher values raise concern for possible prostate pathology, though they can also be influenced by non-cancer factors such as prostatitis, benign prostatic hyperplasia, ejaculation, recent procedures, or infection. In ultrasound practice, a PSA near or above this threshold often leads to further evaluation with imaging and possibly biopsy, but the result by itself isn’t diagnostic.