@article {FIALA1705, author = {ONDREJ FIALA and MILOS PESEK and JINDRICH FINEK and LUCIE BENESOVA and ZBYNEK BORTLICEK and MAREK MINARIK}, title = {Gene Mutations in Squamous Cell NSCLC: Insignificance of EGFR, KRAS and PIK3CA Mutations in Prediction of EGFR-TKI Treatment Efficacy}, volume = {33}, number = {4}, pages = {1705--1711}, year = {2013}, publisher = {International Institute of Anticancer Research}, abstract = {Background: Epidermal growth factor receptor (EGFR), Kirsten rat sarcoma viral oncogene (KRAS) and phosphatidylinositide-3-kinase catalytic subunit-alpha (PIK3CA) mutations are biomarkers used for the prediction of efficacy of EGFR tyrosine kinase inhibitors (EGFR-TKIs) in advanced non-small cell lung cancer (NSCLC). Patients and Methods: In total, 223 patients with advanced-stage squamous cell NSCLC were tested; 179 patients were treated with EGFR-TKIs. Genetic testing was performed using a combination of denaturing capillary electrophoresis and direct Sanger sequencing. Results: EGFR mutations were detected in 7.2\%; KRAS mutations in 7.4\% and PIK3CA mutations in 3.8\% of patients. No correlation of EGFR or PIK3CA mutation status with progression-free survival (PFS) (p=0.425; p=0.197), nor overall survival (OS) (p=0.673; p=0.687), was observed. KRAS mutations correlated with shorter OS (p=0.039), but not with PFS (p=0.120). Conclusion: We did not observe any role of EGFR, KRAS, PIK3CA mutations in prediction of EGFR-TKIs efficacy in patients with advanced-stage squamous cell NSCLC.}, issn = {0250-7005}, URL = {https://ar.iiarjournals.org/content/33/4/1705}, eprint = {https://ar.iiarjournals.org/content/33/4/1705.full.pdf}, journal = {Anticancer Research} }