🎯 Prostate Health

What this panel can settle, and by what logic

Seven markers, and the design is better than it looks: three of them exist to explain a raised PSA cheaply before anybody panics about it.

1. Free and percent-free PSA beside the total is the point of the panel. Malignant tissue produces proportionally more bound PSA, so at the same total a lower percent-free carries higher risk. It matters because total PSA alone is close to uninformative in the band men are actually tested in: among 307 men with a total under 10 ng/mL, 95 of them (30.9%) had cancer on biopsy, and total PSA separated positive from negative biopsies at an AUC of only 0.611, with a specificity of 23.2% at 90% sensitivity Fan 2019.
2. Urinalysis, Routine with hs-CRP (High-Sensitivity C-Reactive Protein) is the cheapest correct next question. Prostatitis and urinary infection both raise PSA and both resolve in a fortnight, so a raised PSA with pyuria is a different result from a raised PSA over clean urine — and a repeat after treatment is what tells them apart.
3. Total & Free DHT beside Total Testosterone and Estradiol, Sensitive (LC/MS-MS) explains growth rather than cancer. DHT is the androgen driving prostatic growth and estradiol contributes to benign enlargement. Both are read against age- and sex-specific steroid intervals rather than one adult range Kunz 2023.
4. Creatinine on the Comprehensive Metabolic Panel (CMP) earns its place only if the stream is poor, because chronic obstruction is the route from a urinary symptom to kidney injury.

What it cannot settle, and what would

It cannot separate benign enlargement from cancer, and no blood test can. That is what an AUC of 0.611 means in practice Fan 2019: a raised PSA is a reason to look, not a finding. What answers the question is imaging and tissue — a multiparametric MRI, and where it is positive a targeted biopsy, which is the pathway randomized trials have compared against systematic ultrasound-guided sampling Kasivisvanathan 2024.

A PSA taken on finasteride or dutasteride is not a PSA until it is corrected. 5-alpha reductase inhibitors roughly halve it, and urologists monitoring men on them work from a doubling rule or from the rise above an on-treatment nadir rather than the raw value; in a survey of 200 urologists in Spain and Brazil the leading concern was these drugs masking prostate cancer, and the same survey found no agreed standard for interpreting a treated value Palacios 2025. The drugs also change what the scan sees: in men treated for more than 6 months, PI-RADS 3 lesions were reported in 37.1% against 20.6% of untreated men Aksu 2024. If you take one for hair loss, it belongs on the form.

A percent-free PSA is not a decision either. The derivatives shift the odds and they do not replace the pathway Fan 2019 Kasivisvanathan 2024, which is why a low percent-free goes to a urologist rather than to a supplement.

And it cannot see the prostate. Nothing here reports its size. A digital rectal examination, a post-void residual and a symptom score are what turn “my stream is weak” into a diagnosis, and urinary symptoms with a completely normal PSA still deserve a clinician.

Draw conditions that decide whether the money is wasted

PSA is the most easily spoiled number on this site, and for once the spoiling has been measured.

1. No cycling for 24 to 48 hours. In 129 men aged 50 to 71 riding 55 to 160 km, total PSA rose by an average of 9.5% (95% CI 6.1 to 12.9, p<0.001), or 0.23 ng/mL, drawn within 5 minutes of finishing — and the number of men above the 4.0 ng/mL cut-off went from 2 to 6 Mejak 2013. Four men acquired a prostate problem by riding a bicycle.
2. No ejaculation for 48 hours, and draw before a digital rectal examination rather than after it. The same paper's recommendation is 24 to 48 hours clear of both Mejak 2013.
3. Not within 6 weeks of a urinary infection or prostatitis, which lift PSA by far more than cycling does and are the commonest benign explanation for a frightening number. Treat first, then measure Fan 2019.
4. Declare finasteride or dutasteride and the date you started. Without that date nobody can apply a doubling rule or locate your on-treatment nadir Palacios 2025.
5. Same laboratory every time. PSA methods and the intervals reported against them are not interchangeable, and this panel is bought for a trend Lorde 2023.

How you would know it answered your question, and what each pattern means next

Velocity carries more information than any single value, so most of these are instructions about the second measurement.

• Total PSA above 4 ng/mL, or above 2.5 ng/mL under 50: repeat in 6 weeks under the conditions above and with any infection treated, then take both numbers to a urologist. The next test is an MRI, not another blood panel Kasivisvanathan 2024.
• Total between 4 and 10 ng/mL with a low percent-free: the situation the extra $30 was bought for. It shifts the odds toward investigation, and the investigation starts with imaging Fan 2019 Kasivisvanathan 2024.
• Raised PSA with an abnormal Urinalysis, Routine: treat, then redraw at 6 weeks. A PSA that normalizes was prostatitis; one that does not needs the same referral it would have needed over clean urine.
• On a 5-alpha reductase inhibitor: double the value before comparing it to anything, and follow the rise above your on-treatment nadir rather than the absolute number — a PSA climbing while on the drug is the signal, at any level Palacios 2025.
• Normal PSA with urinary symptoms: the panel has done its job. That is benign enlargement until a clinician says otherwise, and Total & Free DHT with Estradiol, Sensitive (LC/MS-MS) is the part of the result that explains the growth Kunz 2023. Repeat PSA annually rather than quarterly, because a velocity needs a year before it is a velocity.

Sources read for these sections

• Fan YH, et al. Prostate Health Index outperforms other PSA derivatives in predicting a positive biopsy in men with tPSA <10 ng/mL: Largest prospective cohort in Taiwan. Journal of the Chinese Medical Association 2019 · PMID 31356566
• Kasivisvanathan V, et al. VISION: An Individual Patient Data Meta-analysis of Randomised Trials Comparing Magnetic Resonance Imaging Targeted Biopsy with Standard Transrectal Ultrasound Guided Biopsy in the Detection of Prostate Cancer. European Urology 2024 · PMID 39232979
• Palacios JM, et al. Monitoring of prostate-specific antigen in men with benign prostate enlargement receiving 5-alpha reductase inhibitors: a non-interventional, cross-sectional study of real-world practice of urologists in Spain and Brazil. BMC Urology 2025 · PMID 39891103
• Aksu M, et al. The effect of 5-alpha reductase inhibitors on the detection of prostate cancer with multiparametric magnetic resonance imaging and prostate biopsy. Croatian Medical Journal 2024 · PMID 39492451
• Mejak SL, et al. Long distance bicycle riding causes prostate-specific antigen to increase in men aged 50 years and over. PLoS One 2013 · PMID 23418500
• Kunz S, et al. Age- and sex-adjusted reference intervals for steroid hormones measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS) using a widely available kit. Endocrine Connections 2023 · PMID 37938144
• Lorde N, et al. Impact of Variation between Assays and Reference Intervals in the Diagnosis of Endocrine Disorders. Diagnostics (Basel) 2023 · PMID 37998589