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Test ID EGFRS EGFR Gene, Targeted Mutation Analysis, 51 Mutation Panel, Tumor

Specimen Required

Necessary Information

Pathology report must accompany specimen in order for testing to be performed.

Specimen Required


Specimen Type: Tissue, smear stained with Diff Quik, fine needle aspirate (FNA), or pleural fluid in cell blocks

Container/Tube: Tissue block

Collection Instructions: Submit a formalin-fixed, paraffin-embedded (FFPE) tissue block.



Specimen Type: Tissue, smear stained with Diff Quik, fine needle aspirate, or pleural fluid in cell block or cytology blood smear

Container/Tube: Slides

Specimen Volume: 1 Stained and 5 unstained

Collection Instructions:

1. For FFPE tissue, FNA or pleural fluid: Submit 1 slide stained with hematoxylin and eosin and 5 unstained, non-baked slides with 5-10-micron thick sections of the tumor tissue.

2. For cytology blood smear: Submit up to 2 slides stained with Diff Quik

Useful For

Identifying non-small cell lung cancers that may respond to epidermal growth factor receptor-targeted therapies

Additional Tests

Test ID Reporting Name Available Separately Always Performed
SLIRV Slide Review in MG No, (Bill Only) Yes

Testing Algorithm

When this test is ordered, slide review will always be performed at an additional charge.

Method Name

Polymerase Chain Reaction (PCR)

Reporting Name

EGFR Gene, Mutation Analysis, Tumor

Specimen Type


Specimen Minimum Volume

Formalin-fixed, paraffin-embedded tissue block or Slides: see Specimen Required
Cytology smear stained with Diff Quik: >1000 cells

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Ambient (preferred)

Reference Values

An interpretive report will be provided.

Day(s) Performed

Monday through Friday

Report Available

5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

81235-EGFR (epidermal growth factor receptor) (eg, non-small cell lung cancer) gene analysis, common variants (eg, exon 19 LREA deletion, L858R, T790M, G719A, G719S, L861Q)

88381-Microdissection, manual

LOINC Code Information

Test ID Test Order Name Order LOINC Value
EGFRS EGFR Gene, Mutation Analysis, Tumor 21665-5


Result ID Test Result Name Result LOINC Value
616123 Result Summary 50397-9
616124 Result 21665-5
616125 Interpretation 69047-9
616126 Specimen 31208-2
616127 Source 31208-2
616128 Tissue ID 80398-1
616129 Released By 18771-6

Test Classification

This test was developed, and its performance characteristics 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.


If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.