EGFR Mutation Analysis
Also known as: therascreen EGFR RGQ PCR Kit
Use
In non-small cell lung cancer, many mutations in EGFR are associated with responsiveness to EGFR tyrosine kinase inhibitor (TKI) therapy. In contrast, some mutations in EGFR are associated with resistance to EGFR TKI therapy, including T790M and EGFR exon 20 insertions. The T790M mutation is a known mechanism of resistance and is commonly associated with relapse following initial therapy with EGFR TKI.
Special Instructions
Not provided.
Limitations
The EGFR test is designed to detect mutations in exon 18, 19, 20, and 21 of the EGFR gene. These mutations account for >99% of all reported EGFR mutations in NSCLC patients. Samples with results reported as "no mutation detected" may harbor EGFR mutations that are not detected by the assay. Detection of mutation is dependent on sample integrity and the amount of amplifiable DNA present in the specimen. The methods used in this assay are highly selective and, depending on the total amount of DNA present, can detect approximately 2% to 20% of mutant in a background of wild-type genomic DNA.
Methodology
PCR-based (SNaPshot Multiplex PCR)
Biomarkers
EGFR
Gene
Result Turnaround Time
5-7 days
Related Documents
For more information, please review the documents below
Specimen
Tissue (FFPE)
Volume
Five unstained slides and one matching H&E-stained slide at 10 μM or formalin-fixed, paraffin-embedded tissue block
Minimum Volume
Two unstained slides and one matching H&E-stained slide at 10 μM (Note: Samples with >4 mm² and ≥50% tumor content are preferred.)
Container
Slides or blocks
Storage Instructions
Submit blocks/slides at room temperature.
Causes for Rejection
Tumor block containing insufficient tumor; tissue or tumor fixed in a heavy metal fixative; broken or stained slides
Other tests from different labs that may be relevant