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Test ID 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).

Reporting Name

cfDNA PIK3CA Test, Blood

Specimen Type

Whole blood

Specimen 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

Reference Values

An interpretive report will be provided

Day(s) Performed

Monday through Friday

Report Available

5 to 10 days

Performing 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


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