Senior Urologist & Uro-Oncologist, Apollo Hospital Gurugram
Part 3 of 10 in Diagnosis and Management of Prostate Cancer
PSA Testing: Age-Adjusted Thresholds, Density and Velocity
July 7, 2024
PSA is a foundational blood test in prostate cancer evaluation, but it has to be ordered and interpreted with real discipline: it rises in infection and urinary retention just as it does in cancer, so a single high reading means little on its own.
Age-adjusted PSA thresholds
Normal PSA levels are age-adjusted: under 2.5 for ages 40-49, under 3.5 for 50-59, under 4.5 for 60-69, and under 6.5 for 70-79. A single abnormal reading is never enough to act on. At least two PSA readings above the age-adjusted threshold are needed before moving forward.
PSA density and velocity
Asked what other factors matter when interpreting age-adjusted PSA levels beyond ruling out a urinary tract infection, Dr. Shrivastava pointed to PSA density and PSA velocity. A PSA density above 0.15 is suspicious for cancer, and a PSA rising by more than 0.75 per year is also suspicious, both useful when a single reading sits in a borderline zone.
Rule out infection first
Before any biopsy, it is essential to confirm the patient does not have a urinary infection causing a falsely high PSA. If a patient has a high PSA alongside fever or burning on urination, and urine tests confirm infection, the right move is to treat the infection with antibiotics and recheck PSA a few weeks later, not to biopsy immediately.
This article is based on a Jivo Masterclass session conducted by Dr. Nitin Shrivastava, Consultant, Urology and Uro-Oncology, Artemis Hospital, Gurgaon (his affiliation at the time of this session). The article has been summarised with the assistance of an AI tool from the original masterclass recording. Watch the full Masterclass recording
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This guide is based on a live Jivo Masterclass: Dr.Nitin Shrivastava taught doctors across Africa on July 7, 2024.
FROM THE LIVE Q&A
Moderator
What factors should we consider when interpreting age-adjusted PSA levels, other than UTI?
Dr.Nitin Shrivastava
The rise in subsequent PSA levels, PSA velocity, and PSA density all give more clues when a reading is borderline, and these additional tests should be done before deciding on a biopsy.
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Frequently Asked Questions
What is the time range that should be considered between two PSA measurements during screening?▼
Routine mass PSA screening is not recommended. But for high-risk patients, yearly PSA is a good idea. If the PSA comes out abnormal, it should be repeated after four to six weeks.
What is the best method of managing BPH?▼
First make sure BPH is not causing damage to the kidneys. For mild symptoms, only lifestyle management is needed. For bothersome symptoms, a single alpha blocker is used. There is no one universal method; if it's damaging the kidneys, surgery is needed.
Apart from PSA, what other hormones should be monitored in case of prostate cancer?▼
None. PSA is the only one.
What are the factors contributing to prostate cancer, and what are the staging parameters?▼
The most important contributing factor is genetics and family history. Researchers point to some role of obesity and possibly a non-vegetarian diet, but these risk factors are not firmly established.
What is a neobladder? What is an ileal conduit? How will treatment affect my quality of life?▼
Neobladder and ileal conduit are treatments for bladder cancer, not prostate cancer. A neobladder is an artificial bladder made from the patient's intestine, stitched together so the patient continues to pass urine through their natural passage. An ileal conduit instead diverts urine to exit through a different passage into a bag. On quality of life: what matters most in the long run is that the cancer comes out of the body completely; patients adjust well to either option over time.
What are the age-adjusted PSA thresholds?▼
Under 2.5 for ages 40-49, under 3.5 for 50-59, under 4.5 for 60-69, and under 6.5 for 70-79, with at least two readings above threshold needed before acting.
What PSA density and velocity values are considered suspicious?▼
A PSA density above 0.15, or a PSA rise of more than 0.75 per year, are both considered suspicious for cancer.
In This Series: Diagnosis and Management of Prostate Cancer
- 1.Diagnosis and Management of Prostate Cancer
- 2.Why Physical Examination Still Matters in Prostate Cancer
- 3.PSA Testing: Age-Adjusted Thresholds, Density and Velocity
- 4.Who Needs Earlier Prostate Cancer Screening
- 5.When to Biopsy: Balancing Missed Cancer Against Overtreatment
- 6.Biopsy Technique and Imaging: Transrectal vs Transperineal, CT vs MRI
- 7.Managing BPH: From Lifestyle to Alpha-Blockers to Surgery
- 8.TURP: How Often It Can Be Repeated, and the Real Tradeoff
- 9.After Prostate Surgery: Incontinence, Neobladder and Quality of Life
- 10.Nutrition and Multidisciplinary Care in Prostate Cancer