Prostate-Specific Antigen (PSA), Free: Total Ratio

The Prostate-Specific Antigen (PSA), Free: Total Ratio is a measurement that compares the amount of free PSA in the blood to the total amount of PSA. This ratio is calculated by dividing the amount of free PSA by the total PSA level.

A low ratio can indicate an increased risk of prostate cancer, as lower levels of free PSA may suggest the presence of cancerous cells in the prostate. A high ratio, on the other hand, is often associated with non-cancerous conditions such as an enlarged prostate or inflammation.

This ratio is used in conjunction with other tests and evaluations to help healthcare providers determine the likelihood of prostate cancer in an individual and to help guide decisions about further testing or treatment options.