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HelpTest ID PHI11 Prostate Health Index Reflex, Serum
Specimen Required
Patient Preparation:
1. Specimens for testing should be collected prior to prostate manipulations such as digital rectal examination, prostatic massage, transrectal ultrasound, and prostatic biopsy.
2. A 6-week waiting period between needle biopsy and specimen collection is recommended.
3. Specimens should not be collected from patients receiving therapy with high biotin (vitamin B7) doses (ie, >5 mg/day) until at least 8 hours following the last biotin administration.
Supplies: Sarstedt Aliquot Tube 5 mL (T914)
Collection Container/Tube: Red top (serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Within 3 hours of collection, centrifuge, aliquot serum into a plastic vial, and refrigerate. Freeze sample within 24 hours of collection and send frozen.
Useful For
As an aid in distinguishing prostate cancer from benign prostatic conditions in men aged 50 years and older with total PSA between 4.0 and 10.0 ng/mL and digital rectal examination findings that are not suspicious for cancer
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| PHI13 | Prostate Health Index (phi) Reflex | No | No |
Testing Algorithm
This test begins with the analysis of prostate-specific antigen (PSA). If the PSA concentration is between 2.0 and 10.0 ng/mL, then the reflex test will be performed at an additional charge.
If the initial PSA concentration is between 2.0 and 10.0 ng/mL, then free PSA and [-2]pro-PSA isoform results will be reported.
If the initial PSA concentration is between 4.0 and 10.0 ng/mL, then the percent free PSA result and prostate health index (phi) will be calculated and reported.
If the initial PSA concentration is between 2.0 and 4.0 ng/mL, then the percent free PSA result and prostate health index (phi) will not be calculated or reported.
Method Name
Immunoenzymatic Assay
Reporting Name
Prostate Health Index Reflex, SSpecimen Type
Serum RedSpecimen Minimum Volume
0.75 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum Red | Frozen (preferred) | 150 days | |
| Ambient | 24 hours | ||
| Refrigerated | 24 hours |
Reference Values
Females: Not applicable
PROSTATE-SPECIFIC ANTIGEN (PSA) MALES:
|
Age |
Reference range |
|
<40 years |
≤2.0 ng/mL |
|
40-49 years |
≤2.5 ng/mL |
|
50-59 years |
≤3.5 ng/mL |
|
60-69 years |
≤4.5 ng/mL |
|
70-79 years |
≤6.5 ng/mL |
|
≥80 years |
≤7.2 ng/mL |
PERCENT FREE PSA MALES:
When PSA is in the range of 4.0-10.0 ng/mL
|
% Free PSA |
Probability of cancer |
|
≤10% |
56% |
|
11-15% |
28% |
|
16-20% |
20% |
|
21-25% |
16% |
|
>25% |
8% |
PROSTATE HEALTH INDEX (phi) MALES:
When PSA is in the range of 4.0-10.0 ng/mL
|
phi range |
Probability of cancer |
95% Confidence interval |
|
0-26.9 |
9.8% |
5.2-15.4% |
|
27.0-35.9 |
16.8% |
11.3-22.2% |
|
36.0-54.9 |
33.3% |
26.8-39.9% |
|
≥55.0 |
50.1% |
39.8-61.0% |
Day(s) Performed
Monday through Saturday
Report Available
1 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
84153 - Total PSA
84154 - Free PSA (if appropriate)
86316 - [-2]ProPSA (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PHI11 | Prostate Health Index Reflex, S | 53764-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| PHI12 | Prostate Specific Antigen, S | 83112-3 |
Forms
If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.