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Int. J. Mol. Sci. 2013, 14(12), 24549-24559; doi:10.3390/ijms141224549
Article

EGFR Mutations in Surgically Resected Fresh Specimens from 697 Consecutive Chinese Patients with Non-Small Cell Lung Cancer and Their Relationships with Clinical Features

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Received: 11 October 2013; in revised form: 2 December 2013 / Accepted: 12 December 2013 / Published: 17 December 2013
(This article belongs to the Special Issue Advances in Cancer Diagnosis)
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Abstract: We aimed to reveal the true status of epidermal growth factor receptor (EGFR) mutations in Chinese patients with non-small cell lung cancer (NSCLC) after lung resections. EGFR mutations of surgically resected fresh tumor samples from 697 Chinese NSCLC patients were analyzed by Amplification Refractory Mutation System (ARMS). Correlations between EGFR mutation hotspots and clinical features were also explored. Of the 697 NSCLC patients, 235 (33.7%) patients had tyrosine kinase inhibitor (TKIs) sensitive EGFR mutations in 41 (14.5%) of the 282 squamous carcinomas, 155 (52.9%) of the 293 adenocarcinomas, 34 (39.5%) of the 86 adenosquamous carcinomas, one (9.1%) of the 11 large-cell carcinomas, 2 (11.1%) of the 18 sarcomatoid carcinomas, and 2 (28.6%) of the 7 mucoepidermoid carcinomas. TKIs sensitive EGFR mutations were more frequently found in female patients (p < 0.001), non-smokers (p = 0.047) and adenocarcinomas (p < 0.001). The rates of exon 19 deletion mutation (19-del), exon 21 L858R point mutation (L858R), exon 21 L861Q point mutation (L861Q), exon 18 G719X point mutations (G719X, including G719C, G719S, G719A) were 43.4%, 48.1%, 1.7% and 6.8%, respectively. Exon 20 T790M point mutation (T790M) was detected in 3 squamous carcinomas and 3 adenocarcinomas and exon 20 insertion mutation (20-ins) was detected in 2 patients with adenocarcinoma. Our results show the rates of EGFR mutations are higher in all types of NSCLC in Chinese patients. 19-del and L858R are two of the more frequent mutations. EGFR mutation detection should be performed as a routine postoperative examination in Chinese NSCLC patients.
Keywords: EGFR mutations; NSCLC; targeted therapy; ARMS; surgery; fresh tumor specimens EGFR mutations; NSCLC; targeted therapy; ARMS; surgery; fresh tumor specimens
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lai, Y.; Zhang, Z.; Li, J.; Sun, D.; Zhou, Y.; Jiang, T.; Han, Y.; Huang, L.; Zhu, Y.; Li, X.; Yan, X. EGFR Mutations in Surgically Resected Fresh Specimens from 697 Consecutive Chinese Patients with Non-Small Cell Lung Cancer and Their Relationships with Clinical Features. Int. J. Mol. Sci. 2013, 14, 24549-24559.

AMA Style

Lai Y, Zhang Z, Li J, Sun D, Zhou Y, Jiang T, Han Y, Huang L, Zhu Y, Li X, Yan X. EGFR Mutations in Surgically Resected Fresh Specimens from 697 Consecutive Chinese Patients with Non-Small Cell Lung Cancer and Their Relationships with Clinical Features. International Journal of Molecular Sciences. 2013; 14(12):24549-24559.

Chicago/Turabian Style

Lai, Yuanyang; Zhang, Zhipei; Li, Jianzhong; Sun, Dong; Zhou, Yong'an; Jiang, Tao; Han, Yong; Huang, Lijun; Zhu, Yifang; Li, Xiaofei; Yan, Xiaolong. 2013. "EGFR Mutations in Surgically Resected Fresh Specimens from 697 Consecutive Chinese Patients with Non-Small Cell Lung Cancer and Their Relationships with Clinical Features." Int. J. Mol. Sci. 14, no. 12: 24549-24559.



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