SimpleScreen CRC Blood Test Achieves Clinical Validation Goals

Prostate-specific antigen, commonly known as PSA, is a protein produced by cells in the prostate gland. This substance is found in higher concentrations in semen but also circulates in small amounts in the bloodstream. The PSA test is a blood test that measures the level of this protein in your blood and is primarily used as a screening tool for prostate health. While PSA is naturally produced by the prostate, elevated levels can indicate various conditions affecting this gland, including prostate cancer, benign prostatic hyperplasia (enlarged prostate), or prostatitis (inflammation of the prostate).

Healthcare providers typically order PSA testing for men as part of routine health screenings, particularly for those over 50 years of age or those with risk factors for prostate cancer. The test may also be recommended for men experiencing urinary symptoms such as frequent urination, difficulty urinating, or pain during urination. Additionally, men with a family history of prostate cancer or those of African descent, who have a higher risk of developing prostate cancer, may benefit from earlier or more frequent testing. The test is also used to monitor men who have already been diagnosed with prostate cancer to track treatment effectiveness or detect recurrence.

PSA levels are measured in nanograms per milliliter of blood. Generally, PSA levels below 4.0 nanograms per milliliter are considered normal, though this can vary based on age and individual circumstances. Levels between 4.0 and 10.0 are considered borderline and may warrant further investigation, while levels above 10.0 suggest a higher likelihood of prostate cancer. However, it is important to understand that elevated PSA levels do not automatically mean cancer is present. Many factors can temporarily raise PSA levels, including recent sexual activity, vigorous exercise, bicycle riding, certain medical procedures like catheterization or prostate biopsy, urinary tract infections, and some medications.

The PSA test requires a simple blood draw, usually from a vein in your arm. No special preparation is typically needed, although your doctor may advise you to avoid certain activities before the test. It is generally recommended to abstain from sexual activity for 24 to 48 hours before the test and to avoid strenuous exercise or bicycle riding during this period. If you have had a prostate biopsy, digital rectal exam, or other prostate procedures, your healthcare provider may suggest waiting several weeks before PSA testing to ensure accurate results.

While the PSA test is a valuable screening tool, it has limitations and should not be used alone to diagnose prostate cancer. An elevated PSA level may lead to additional testing, such as a repeat PSA test, a digital rectal examination, prostate imaging studies, or a prostate biopsy to determine the underlying cause. Men should discuss the benefits and limitations of PSA testing with their healthcare provider to make informed decisions about screening based on their individual risk factors, age, and overall health status.