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: Prostate Volume Calculated from Prostate Specific Antigen

Published: August 9, 2026Updated: August 16, 2026

: This is a calculated estimate of prostate volume derived from prostate specific antigen (PSA) results, rather than a direct physical measurement of the gland.

Quick summary

[": It provides an estimated prostate size based on PSA values and is not a substitute for imaging or direct volume measurement."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
15324-7
Short code
PSA/Prostate vol PLN Calc
Synonyms
PSA/Prostate vol PLN Calc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0
Ref high
4
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
calculated-pln
CPT
84153
SNOMED
39392002
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

: What This Test Represents

: The result is a calculated value intended to approximate prostate volume using PSA and related inputs. Because it is derived rather than measured directly, it should be interpreted as an estimate.

: How It Differs From Direct Measurement

: Prostate volume is most accurately assessed with imaging such as transrectal ultrasound or MRI. A calculated estimate cannot capture the exact size or shape of the gland.

: Why It May Be Used

: Clinicians sometimes use PSA-based estimates to support risk assessment or to decide whether further evaluation, such as imaging, may be helpful.

: Limitations to Keep in Mind

: PSA can rise for reasons unrelated to prostate size, including infection, inflammation, or recent procedures. Estimates derived from PSA therefore have important limitations and should not be relied on alone.

Reference range

Normal: <4.0 ng/mLN/A

Specimen: serum

No special preparation required. For PSA, avoid sexual activity for 24-48 hours before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

: Prostate volume estimates can inform discussions about benign prostatic enlargement, urinary symptoms, and prostate cancer risk. However, because this value is calculated, clinical decisions should also consider symptoms, digital rectal examination, and imaging where appropriate.

Short name

: PSA-Derived Prostate Volume

Frequently asked questions

: Is this the same as a measured prostate volume?
: No. It is an estimate calculated from PSA and related data, not a direct measurement from imaging.
: Can I use this number instead of an ultrasound or MRI?
: No. Imaging remains the standard for directly measuring prostate size, and your clinician will decide when it is needed.
: Does a high calculated volume mean I have prostate cancer?
: No. An enlarged or estimated-larger prostate is common with benign conditions, and cancer risk is assessed using multiple factors, not this value alone.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy