Home
HelpTest Code PIK3B Cell-Free DNA PIK3CA Test, Blood
Shipping Instructions
1. Samples should be transported at ambient temperature or refrigerated (4° C)
2. Samples are viable for 7 days in the Streck Black/Tan Top Tube Kit
Specimen Required
Supplies: Streck Black/Tan Top Tube Kit (T715)
Specimen Volume: Two, 10-mL Streck cell-free DNA (cfDNA) blood collection tubes
Additional Information:
1. Only blood collected in Streck cfDNA tubes will be accepted for analysis.
2. Whole blood will be processed to produce platelet-poor plasma before cfDNA isolation.
Useful For
Identification of hormone receptor positive and human epidermal growth factor receptor 2 negative (HR+/HER2-) advanced breast cancer tumors that may be eligible for treatment with targeted kinase inhibitor therapy (eg, alpelisib).
Method Name
Polymerase Chain Reaction (PCR)
Reporting Name
cfDNA PIK3CA Test, BloodSpecimen Type
Whole bloodSpecimen Minimum Volume
One 10 mL Streck cell-free DNA tube
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole blood | Ambient (preferred) | 7 days | Streck Black/Tan top |
| Refrigerated | 7 days | Streck Black/Tan top |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
An interpretive report will be provided
Interpretation
The interpretation of molecular biomarker results includes an overview of the results and the associated diagnostic, prognostic, and therapeutic implications.
Day(s) Performed
Monday through Friday
Report Available
5 to 10 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
81309
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PIK3B | cfDNA PIK3CA Test, Blood | 60034-6 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 616647 | Result Summary | 50397-9 |
| 616648 | Result | 82939-0 |
| 616649 | Interpretation | 69047-9 |
| 616650 | Additional Info | 48767-8 |
| 616651 | Specimen | 31208-2 |
| 616652 | Source | 31208-2 |
| 616653 | Released By | 18771-6 |
Forms
If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.