Reference values (PSA)

There has been recent guidance as to the level of PSA test that indicates further investigation is required (1). This reference range takes into account the patients age.

NICE state (1):

• Consider a prostate-specific antigen (PSA) test and digital rectal examination to assess for prostate cancer in people with:
  • any lower urinary tract symptoms, such as nocturia, urinary frequency, hesitancy, urgency or retention or
  • erectile dysfunction or
  • visible haematuria
    
    
• consider referring people with possible symptoms of prostate cancer, using a suspected cancer pathway referral (for an appointment within 2 weeks) for prostate cancer if their PSA levels are above the threshold for their age in table below. Take into account the person's preferences and any comorbidities when making the decision.

Age-specific PSA thresholds for people with possible symptoms of prostate cancer

PSA is also used as a means of monitoring disease:

Its main use is to monitor disease:

• if PSA > 40, there is a high chance that there is nodal or metastatic spread
• if PSA > 100, there is almost certainly metastatic spread

Note that reference ranges may vary between laboratories.

Reference:

1. NICE (December 2021). Suspected cancer: recognition and referral
2. NHS Cancer screening programmes - Prostate Cancer Risk Management Programme (2002).