Assessment of EGFR mutations in patients diagnosed of squamous non-small cell lung cancer (NSCLC).

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. e18106-e18106
Author(s):  
Francisco Lobo ◽  
Manuel Domine ◽  
Federico Rojo ◽  
Yann Izarzugaza ◽  
Ana Leon ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Squamous Cell ◽  
Cell Lung Cancer ◽  
Egfr Mutation ◽  
Small Cell ◽  
Egfr Mutations ◽  
Small Cell Lung ◽  
Exon 20 ◽  
Nsclc Patients

e18106 Background: Mutations in the Epidermal Growth Factor Receptor (EGFR) predict a better outcome to EGFR tyrosine kinase inhibitors than platinum-based chemotherapy in advanced non-small cell lung cancer (NSCLC). Previous studies with Caucasian patients have shown a prevalence of EGFR mutation of 10-15%. The aim of this study is to analyze the prevalence of EGFR mutations in squamous-cell NSCLC patients from an area of influence of 500,000 habitants. Methods: Prospective mutation testing in NSCLC patients included in our institution since October 2010 to January 2012 was performed on DNA obtained from available tumor tissue and cytologic samples, using ARMS-scorpion TheraScreen EGFR 29 Mutation Test Kit (Qiagen). Results: From 218 consecutive NSCLC diagnoses, 18 (8.25%) patients showed EGFR mutations: 6 (33.3%) exon 19 deletion, 9 (50%) exon 21 mutations (7 L858R and 2 L861Q) and 3 (16.6%) cases exon 20 insertion. In the EGFR mutated population, 16 (88.88%) patients were diagnosed as adenocarcinoma and 2 (11.11%) as squamous cell carcinoma. The characteristics of these squamous cell cancer patients were: 2 male; 1 non-smoker, 1 former-smoker; 1 stage IV and 1 stage IB at diagnosis; one case exon 20 insertion and one exon 21 mutation (L858R). Conclusions: The EGFR mutation rate in squamous-cell NSCLC patients in our referral area is superior (11.17%) than previously reported, reinforcing the importance of including EGFR mutation testing in squamous-cell NSCLC population for selecting optimal therapy for these patients.

Prevalence of EGFR mutations in non-small cell lung cancer (NSCLC) smoker patients.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. e21015-e21015 ◽  
Author(s):  
Yann Izarzugaza ◽  
Manuel Domine ◽  
Federico Rojo ◽  
Victoria Casado ◽  
Ana Leon ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Egfr Mutation ◽  
Small Cell ◽  
Egfr Mutations ◽  
Small Cell Lung ◽  
Exon 20 ◽  
Egfr Mutated ◽  
Exon 19

e21015 Background: Mutations in the Epidermal Growth Factor Receptor (EGFR) predict a better response to tyrosine kinase inhibitors compared to platinum-based chemotherapy in advanced non-small cell lung cancer (NSCLC). Previous studies in caucasian population have reported a frequency of EGFR mutation of 10-15%. The aim of this study is to analyze the prevalence of EGFR mutations in caucasian smoker patients with NSCLC. Methods: Prospective mutation testing in NSCLC patients included in our institution since October 2010 to January 2012 was performed on DNA obtained from available tumor tissue and cytologic samples, using ARMS-scorpion TheraScreen EGFR 29 Mutation Test Kit (Qiagen). Results: From 218 consecutive NSCLC diagnoses, 18 (8.25%) patients showed EGFR mutations: 6 (33.3%) exon 19 deletions, 9 (50%) exon 21 mutations (7 cases L858R and 2 cases L861Q) and 3 (16.6%) exon 20 insertions. In the EGFR-mutated patients, 13 (72.25%) were never-smoker and 5 (27.7%) were smoker (3 current-smoker and 2 former-smoker). The EGFR-mutated smoker population showed the following characteristics: 3 female, 2 male; 4 adenocarcinoma, one squamous cell carcinoma; 3 stage IV, 2 stage IA at diagnosis; 1 (20%) case EGFR deletion exon 19, 1 (20%) case insertion exon 20 and 3 patients (60%) mutation exon 21 (2, L858R and 1, L861Q). Conclusions: The EGFR mutation rate in NSCLC smoking patients in our referral area is superior (27.7%) than previously reported, reinforcing the importance of including EGFR mutation testing in NSCLC smoking population for the correct management of these patients.

Prevalence and clinicopathological factors of the EGFR mutation status of Vietnamese non-small cell lung cancer patients.

2019 ◽  
Vol 37 (15_suppl) ◽  
pp. e13120-e13120
Author(s):  
Khoa Trong Mai ◽  
Cam Phuong Pham ◽  
LUNG TIEN Nguyen ◽  
Quynh Thi Thuy Vo ◽  
Nguyen TUAN Anh ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Egfr Mutation ◽  
Small Cell ◽  
Disease Stage ◽  
Egfr Mutations ◽  
Small Cell Lung ◽  
Mutation Status ◽  
Nsclc Patients

e13120 Background: To determine the epidermal growth factor receptor ( EGFR) mutation status in non-small cell lung cancer (NSCLC) patients in Vietnamese population at Bach Mai Hospital, and relation of different variables to the frequency of EGFR mutations. Methods: The EGFR mutation status of 1451 tissue samples in NSCLC patients and correlation among different variables of age, gender, smoking habit and histology groups were evaluated. Results: A total of EGFR mutation analysis was performed, with an overall mutation rate of 40.7%. The most prevalent categories were in-frame deletions in exon 19 (57.2% of the overall mutations); followed by L858R and L861Q in exon 21 (35.7%); exon 18 (4,6%); double mutation: 2.9%; The T790M mutation in exon 20 represented approximately 2.5%; The pooled prevalence of EGFR mutation was higher in female (60.6%), non-smokers (61.1%), and patients with adenocarcinoma (42.2%). Conclusions: The prevalence of EGFR mutations of NSCLC in Vietnam is higher than that in the West, but comparably equal to that in some Asian countries. It is associated with female sex, non-smoker status, and adenocarcinoma, sample tissue type and age, but not depends on disease stage and tumor sampling.

EGFR mutation analysis in histologic and cytologic specimens of non-small cell lung cancer

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 7176-7176 ◽  
Author(s):  
H. Sakai ◽  
K. Akagi ◽  
J. Sudoh ◽  
S. Yoneda ◽  
H. Komagata ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Mutation Analysis ◽  
Cell Lung Cancer ◽  
Egfr Mutation ◽  
Kinase Inhibitor ◽  
Small Cell ◽  
Egfr Mutations ◽  
Polymorphism Analysis ◽  
Small Cell Lung

7176 Background: Recent studies have suggested that EGFR mutations can be used to predict tumor sensitivity to gefitinib (epidermal growth factor receptor tyrosine kinase inhibitor) in patients with non-small-cell lung cancer (NSCLC). Most previous studies of EGFR mutations have used direct sequencing to analyze surgically resected specimens. More rapid, accurate, and simple techniques for analysis of EGFR mutations in histologic or cytologic specimens (i.e., transbronchial biopsy, bronchial washing, pleural effusion, lymph node aspiration) are needed to improve outcomes. Methods: DNA was extracted from histologic or cytologic specimens of NSCLC obtained from March through October 2005. The major mutations of the EGFR gene (exons 18–21) were analyzed by our original technique for fragment analysis and polymerase-chain-reaction-restriction-fragment-length polymorphism analysis. Results: About 2 days were required for mutation analysis. Pathological analysis indicated that 64 (5 histologic and 59 cytologic specimens) of 90 specimens (11 histologic and 79 cytologic specimens) were adenocarcinomas. EGFR mutations were found in 22 of these specimens (2 histologic and 20 cytologic specimens; ex19:del 13, ex19:ins 2, ex21:L858R 7). An EGFR mutation (ex19:del) was also found in a patient with large cell carcinoma. Conclusions: Our method can efficiently detect EGFR mutations in small samples of lung cancer cells obtained from histologic or cytologic specimens. This method is useful for the identification of EGFR mutations in patients with unresectable NSCLC in whom sufficient tissue specimens are difficult to obtain. No significant financial relationships to disclose.

Coexistence of MET exon 14 mutations with EGFR mutations in non-small cell lung cancer.

2017 ◽  
Vol 35 (15_suppl) ◽  
pp. e20636-e20636
Author(s):  
Wen-Feng Li ◽  
Jin Kang ◽  
Xu-Chao Zhang ◽  
Su Jian ◽  
Huajun Chen ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Point Mutations ◽  
Small Cell ◽  
Egfr Mutations ◽  
Small Cell Lung ◽  
Relative Resistance ◽  
L858r Mutation ◽  
Nsclc Patients

e20636 Background: Activation of MET oncogene as the result of amplification or activation MET exon 14 mutations represents an emerging molecular target for non-small cell lung cancer (NSCLC) treatment. MET exon 14 mutations account for 1.0% in Chinese NSCLC patients. However, few data have been reported on the coexisting of MET exon 14 mutations and EGFR mutations in NSCLC. Moreover, the clinicopathological characteristics and targeted therapy of these MET/ EGFR-coexisting patients remain elusive. Methods: Next-generation sequencing was performed on the DNA of 969 patients and Sanger sequencing was conducted on cDNA of 621 patients for MET exon 14 mutations in NSCLCs. EGFR mutations were determined by direct DNA sequencing. Results: Fifteen patients harbored positive MET exon 14 mutations. Frequency of concomitant EGFR and MET exon 14 mutations was 0.2%(3/1590). 3 patients with concomitant MET exon 14 mutation and EGFR activating mutation were all female, never smokers and adenocarcinoma. Their stagings were stageⅠB (n = 1) and stage Ⅳ(n = 2). The stage ⅠB patient harboring concomitant MET exon 14 skipping and EGFR L858R mutation did not relapse 2 years after operation. The other two stage Ⅳ patients received first-line gefitinib. Case one harbored concomitant MET exon 14 point mutations (IVS13-36G > A) and EGFR exon 19 deletion, and showed resistance to gefitinib with progression free survival(PFS) of 2 weeks and overall survival(OS) of 1 month. Case two had concomitant MET exon 14 point mutations (IVS13-36G > A) and EGFR L858R mutation. Meanwhile, she also had both METamplification and c-Met overexpression at the baseline. She showed partial response (PR) to gefitinib with 3.8 months PFS. Then she was enrolled in a clinical trial (NCT02374645) to receive volitinib plus gefitinib on December 20, 2016. Initial response was good PR on January 24, 2017. Only grade 1 rash was observed. Conclusions: Coexisting MET exon 14 /EGFR mutation is an uncommon molecular event in NSCLC patients. Such coexisted patients might show relative resistance to EGFR inhibitor. However, combination of MET and EGFR inhibitors will be potentially a good strategy to overcome such a relative resistance for MET exon 14 /EGFR co-mutant patients.

Anti-PD-1 antibody monotherapy or anti-PD-1 antibody combination with chemotherapy treated non-small cell lung cancer (NSCLC) patients with EGFR mutation: A retrospective analysis.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. e21691-e21691
Author(s):  
Shaorong Yu ◽  
Ran Hu ◽  
Meiqi Shi
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Egfr Mutation ◽  
Objective Response ◽  
Small Cell ◽  
Combined Chemotherapy ◽  
Small Cell Lung ◽  
Egfr Mutant ◽  
Nsclc Patients

e21691 Background: Anti-PD-1/PD-L1 antibody has been approved as first- or second-line therapy in non-small cell lung cancer (NSCLC) patients and modified the management of patients with locally advanced or metastatic NSCLC. However, anti-PD-1 treatment shows less effective in patients with EGFR mutation than in those without driver gene mutation. To determine the activity of anti-PD-1 antibody in EGFR mutant NSCLC, we retrospectively evaluated response patterns among EGFR mutant NSCLC patients. Methods: We identified 58 patients with EGFR mutation who were treated with anti-PD-1 monotherapy or anti-PD-1 antibody combined with chemotherapy from March 2018 to December 2019. All of patients have received more than one treatment regimen including EGFR-TKI treatment. Objective response rates (ORR) were assessed using RECIST v1.1. Results: A total of 58 patients including 53 cases of lung adenocarcinoma, 4 cases of squamous cell carcinoma and 1 case of adenosquamous carcinoma were analyzed. Among them 26 patients received nivolumab treatment, 9 patients with pembrolizumab treatment, 9 patients with sintilimab treatment, 8 patients with JS001 treatment and 6 patients with camrelizumab treatment. Seven patients received anti-PD-1 monotherapy and the other 51 patients received anti-PD-1 combined chemotherapy. The main chemotherapeutic drugs contain docetaxel, pemetrexed, paclitaxel and paclitaxel-albumin. ORR was observed in 6 out of 58 (10%) patients. The disease control rate was 50% (29/58). The median PFS was 2.82 months. All six patients who achieved PR were received anti-PD-1 combined chemotherapy. Four patients died during treatment with anti-PD-1 therapy and we can’t confirm if these were due to cancer progress or immune related tumor hyperprogression. The adverse events were immune related pneumonia (two cases with grade 2 and one case with grade 3) and immune related hepatitis (one case with grade 2). Conclusions: Anti-PD-1 antibody combined chemotherapy seems showed moderate effect on NSCLC patients with EGFR mutation who have received anti-EGFR therapy.

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