EGFR Mutational Analysis
Indication
Mutations (point mutations, insertions, deletions) in exons 18-21 of the epidermal growth factor receptor (EGFR) gene are found in a subset of non-small cell lung cancer (NSCLC). Mutations are found in K-ras wildtype tumors and are more frequently seen in patients without a smoking history. The presence of mutations may confer an improved response to EGFR-targeted therapy.
Methodology
PCR-based DNA Sanger sequencing.
Test Parameters
This assay will detect mutations in exons 18-21 of the EGFR gene. The sensitivity of detection is approximately one mutated cell per five total cells in the sample.
Turnaround Time
10 days
Sample Requirements
Formalin-fixed, paraffin embedded tissue blocks containing adequate amounts of tumor to be analyzed (see above sensitivity), with areas to be tested indicated. Comparison of normal and tumor, or several different areas of tumor can be done, for additional charge.
Please provide a copy of the corresponding pathology report.
CPT Codes
83890 (DNA Isolation), 83912, 83898x4, 83894, 83904x4
Additional charges may apply for tissue extraction.
The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.