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Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations

  • Authors:
    • Tengteng Wang
    • Tao Zhang
    • Xiaoxue Han
    • Xi Liu
    • Naikang Zhou
    • Yang Liu
  • View Affiliations / Copyright

    Affiliations: Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing 100853, P.R. China, Department of Ultrasound, Chinese Capital Institute of Pediatrics, Beijing 100020, P.R. China
    Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2095-2103
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    Published online on: April 14, 2015
       https://doi.org/10.3892/etm.2015.2422
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Abstract

The aim of the present study was to compare pathological diagnoses, as determined by the new International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society (IASLC/ATS/ERS) classification, with conventional radiological features. In addition, the present study aimed to evaluate the correlation among clinical characteristics, computed tomography (CT) images and gene mutation status in patients with stage IA adenocarcinoma of the lung. A total of 212 patients with stage IA lung adenocarcinoma were included in the study. The patients were classified into pure ground‑glass opacity (pGGO), mixed GGO (mGGO) and solid GGO (sGGO) by CT imaging. Histological subtype was classified according to the IASLC/ATS/ERS classification of lung adenocarcinoma. In addition, epidermal growth factor receptor (EGFR) and Kirsten rat sarcoma (KRAS) mutation assays were performed, and 36.8% of patients (78/212) were determined to have an EGFR mutation, while 8.5% of patients (18/212) were found to have a KRAS mutation. According to the IASLC/ATS/ERS classification, 44 cases were diagnosed as adenocarcinoma in situ (AIS; 20.8%), 62 cases were diagnosed as minimally invasive adenocarcinoma (MIA; 29.2%) and 106 cases were classified as invasive adenocarcinoma (IAC; 50.0%). pGGO image patterns were observed in 39.2% of patients (n=83), while mGGO and sGGO patterns were observed in 28.8% (n=61) and 32.0% (n=68) of patients, respectively. From pGGO to sGGO, cases of AIS and MIA were shown to have a decreasing trend, while IAC cases exhibited an increasing trend (P=0.036). Analysis of the correlation between CT image patterns and gene mutations demonstrated that L858R point mutations, exon 19 deletions and KRAS mutations were more common in lesions with a lower GGO proportion (P=0.029, 0.027 and 0.018, respectively). Therefore, according to the IASLC/ATS/ERS classification, GGO imaging patterns were shown to correlate with subtypes of adenocarcinomas. In addition, EGFR and KRAS mutations were found to be associated with lesions with a low GGO proportion. Therefore, analysis of GGO lesions may offer useful indications of the histological subtype of an adenocarcinoma in patients with stage IA lung adenocarcinoma, and predictive value for EGFR and KRAS mutations.
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Copy and paste a formatted citation
Spandidos Publications style
Wang T, Zhang T, Han X, Liu X, Zhou N and Liu Y: Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations. Exp Ther Med 9: 2095-2103, 2015.
APA
Wang, T., Zhang, T., Han, X., Liu, X., Zhou, N., & Liu, Y. (2015). Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations. Experimental and Therapeutic Medicine, 9, 2095-2103. https://doi.org/10.3892/etm.2015.2422
MLA
Wang, T., Zhang, T., Han, X., Liu, X., Zhou, N., Liu, Y."Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations". Experimental and Therapeutic Medicine 9.6 (2015): 2095-2103.
Chicago
Wang, T., Zhang, T., Han, X., Liu, X., Zhou, N., Liu, Y."Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations". Experimental and Therapeutic Medicine 9, no. 6 (2015): 2095-2103. https://doi.org/10.3892/etm.2015.2422
Copy and paste a formatted citation
x
Spandidos Publications style
Wang T, Zhang T, Han X, Liu X, Zhou N and Liu Y: Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations. Exp Ther Med 9: 2095-2103, 2015.
APA
Wang, T., Zhang, T., Han, X., Liu, X., Zhou, N., & Liu, Y. (2015). Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations. Experimental and Therapeutic Medicine, 9, 2095-2103. https://doi.org/10.3892/etm.2015.2422
MLA
Wang, T., Zhang, T., Han, X., Liu, X., Zhou, N., Liu, Y."Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations". Experimental and Therapeutic Medicine 9.6 (2015): 2095-2103.
Chicago
Wang, T., Zhang, T., Han, X., Liu, X., Zhou, N., Liu, Y."Impact of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification of stage IA adenocarcinoma of the lung: Correlation between computed tomography images and EGFR and KRAS gene mutations". Experimental and Therapeutic Medicine 9, no. 6 (2015): 2095-2103. https://doi.org/10.3892/etm.2015.2422
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