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Annals of Surgical Oncology
Published in: Annals of Surgical Oncology 9/2013

01-09-2013 | Thoracic Oncology

EGFR and TTF-1 Gene Amplification in Surgically Resected Lung Adenocarcinomas: Clinicopathologic Significance and Effect on Response to EGFR-Tyrosine Kinase Inhibitors in Recurred Cases

Authors: Jae Seok Lee, MD, Hye Ryun Kim, MD, Chang Young Lee, MD, Mihwa Shin, BSc, Hyo Sup Shim, MD, PhD

Published in: Annals of Surgical Oncology | Issue 9/2013

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Abstract

Background

Gene amplifications are implicated in cancer development and progression. In this study we investigated the clinicopathologic characteristics associated with EGFR or TTF-1 amplification in lung adenocarcinomas and its prognostic significance.

Methods

We analyzed 118 cases of surgically resected primary lung adenocarcinomas. Amplification of the EGFR or TTF-1 gene was evaluated by fluorescence in situ hybridization and correlated with patients’ clinicopathologic features, including disease-free survival (DFS) and overall survival (OS), in all patients and a subset that were TTF-1 positive or had EGFR mutation. Progression-free survival (PFS) also was analyzed among patients with EGFR mutation who had recurred cancer that was treated with EGFR tyrosine kinase inhibitors.

Results

EGFR or TTF-1 gene amplification was an independent poor prognostic factor for DFS in all patients (p = 0.001), in patients with TTF-1 positivity (p = 0.010), and in patients with EGFR mutation (p < 0.001) and for OS in patients with TTF-1 positivity (p = 0.021) and patients with EGFR mutation (p < 0.001). Patients with TTF-1 amplification had a shorter PFS following EGFR TKI treatment (p = 0.040).

Conclusions

EGFR or TTF-1 gene amplification was a predictive factor for poor prognosis in terms of DFS and OS, especially in patients with TTF-1 positivity or EGFR mutation. Our results also suggested that TTF-1 amplification might be a predictive marker of poor response to EGFR-TKI therapy in patients with recurrent tumor after surgical resection.
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Metadata
Title
EGFR and TTF-1 Gene Amplification in Surgically Resected Lung Adenocarcinomas: Clinicopathologic Significance and Effect on Response to EGFR-Tyrosine Kinase Inhibitors in Recurred Cases
Authors
Jae Seok Lee, MD
Hye Ryun Kim, MD
Chang Young Lee, MD
Mihwa Shin, BSc
Hyo Sup Shim, MD, PhD
Publication date
01-09-2013
Publisher
Springer US
Published in
Annals of Surgical Oncology / Issue 9/2013
Print ISSN: 1068-9265
Electronic ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-013-2937-2

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