PMID- 20472851 OWN - NLM STAT- MEDLINE DCOM- 20100601 LR - 20220330 IS - 1943-7722 (Electronic) IS - 0002-9173 (Print) IS - 0002-9173 (Linking) VI - 133 IP - 6 DP - 2010 Jun TI - EGFR mutation is a better predictor of response to tyrosine kinase inhibitors in non-small cell lung carcinoma than FISH, CISH, and immunohistochemistry. PG - 922-34 LID - 10.1309/AJCPST1CTHZS3PSZ [doi] AB - About 10% of patients with non-small cell lung carcinoma (NSCLC) respond to epidermal growth factor receptor (EGFR)-targeted tyrosine kinase inhibitors (TKIs). More than 75% of "responders" have activating mutations in EGFR. However, mutation analysis is not widely available, and proposed alternatives (in situ hybridization and immunohistochemical analysis) have shown inconsistent associations with outcome. Fluorescence in situ hybridization (FISH), chromogenic in situ hybridization (CISH), immunohistochemical analysis, and DNA sequencing were compared in this study of 40 NSCLC samples from TKI-treated patients. Response rates were 12 of 19 in EGFR-mutant vs 1 of 20 EGFR wild-type tumors (P = .0001), 7 of 19 FISH+ vs 4 of 17 FISH- tumors (not significant [NS]), 5 of 16 CISH+ vs 6 of 21 CISH- tumors (NS), and 3 of 9 immunohistochemically positive vs 7 of 22 immunohistochemically negative tumors (NS). EGFR mutation was associated with improved progression-free survival (P = .0004). Increased copy number (FISH or CISH) and protein expression (immunohistochemical) did not independently predict outcome. Thus, EGFR sequence analysis was the only method useful for predicting response and progression-free survival following TKI therapy in NSCLC. FAU - Sholl, Lynette M AU - Sholl LM AD - Department of Pathology, Brigham and Women's Hospital, 75 Francis St., Boston, MA 02115, USA. FAU - Xiao, Yun AU - Xiao Y FAU - Joshi, Victoria AU - Joshi V FAU - Yeap, Beow Y AU - Yeap BY FAU - Cioffredi, Leigh-Anne AU - Cioffredi LA FAU - Jackman, David M AU - Jackman DM FAU - Lee, Charles AU - Lee C FAU - Janne, Pasi A AU - Janne PA FAU - Lindeman, Neal I AU - Lindeman NI LA - eng GR - R01 CA114465/CA/NCI NIH HHS/United States GR - R01 CA114465-05/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - England TA - Am J Clin Pathol JT - American journal of clinical pathology JID - 0370470 RN - 0 (Protein Kinase Inhibitors) RN - EC 2.7.10.1 (ErbB Receptors) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) SB - IM CIN - Am J Clin Pathol. 2010 Jul;134(1):7-9. PMID: 20551260 MH - Adult MH - Aged MH - Aged, 80 and over MH - Carcinoma, Non-Small-Cell Lung/*drug therapy/*genetics MH - ErbB Receptors/*genetics MH - Female MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization MH - In Situ Hybridization, Fluorescence/methods MH - Lung Neoplasms/*drug therapy/*genetics MH - Male MH - Middle Aged MH - Mutation MH - Protein Kinase Inhibitors/*therapeutic use MH - Protein-Tyrosine Kinases/metabolism MH - Retrospective Studies MH - Sensitivity and Specificity MH - Sequence Analysis, DNA PMC - PMC3156055 MID - NIHMS299356 EDAT- 2010/05/18 06:00 MHDA- 2010/06/02 06:00 PMCR- 2011/08/15 CRDT- 2010/05/18 06:00 PHST- 2010/05/18 06:00 [entrez] PHST- 2010/05/18 06:00 [pubmed] PHST- 2010/06/02 06:00 [medline] PHST- 2011/08/15 00:00 [pmc-release] AID - 133/6/922 [pii] AID - 10.1309/AJCPST1CTHZS3PSZ [doi] PST - ppublish SO - Am J Clin Pathol. 2010 Jun;133(6):922-34. doi: 10.1309/AJCPST1CTHZS3PSZ.