Prostate Specific Antigen (PSA)


A healthy result should fall into the range 0 - 4 ng/mL.

Prostate-specific antigen (PSA) is one of the proteins that the prostate gland makes. Cancerous cells of the prostate also create these proteins. The purpose of the PSA test is to identify that the prostate gland is stressed and may have significant disease. 

High PSA levels are not necessarily correlated with cancer. They may mean that there is a urinary tract infection or the prostate is simply inflamed.  According to the National Cancer Institute, “there is no clear consensus regarding the optimal PSA threshold for recommending a prostate biopsy for men in any racial or ethnic group.”

Normal Ranges for PSA in ng/mL:

0-4 ng/mL (Optimal range is 0-2.6 ng/mL)

Note: Researchers reported in Urology journal that when PSA levels were between 2.0 and 4.0 ng/mL, about 22% of the patients had prostate cancer. Another study showed that the range for prostate cancer was 1.0 and 2.99 ng/mL.




Prostate Specific Antigen (PSA) result calculator

insert the value from you Prostate Specific Antigen (PSA) test result.

What does it mean if your Prostate Specific Antigen (PSA) result is too low?

Low levels of PSA are not a health problem. 

What does it mean if your Prostate Specific Antigen (PSA) result is too high?

If levels are high, other tests may be ordered to decide where the health issue is originating. For example, a urine test, x-rays, prostate biopsy, transrectal ultrasound or cystoscopy may be ordered.

The PSA test is known for its false-positive or false-negative results. According to the National Cancer Institute, only about 25% of men who have a prostate biopsy because their PSA level was high actually have prostate cancer.

Some specific causes of high PSA levels could include:

- Urinary tract infection

- Prostate cancer

- Prostate inflammation

- Enlarged prostate

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