Epidermal Growth Factor Receptor Mutations in Non-Small Cell Lung Cancers in a Multiethnic Malaysian Patient Population

Liam, Chong-Kin; Leow, Hwong-Ruey; How, Soon-Hin; Pang, Yong-Kek; Chua, Keong-Tiong; Lim, Boon-Khaw; Lai, Nai-Lang; Kuan, Yeh-Chunn; Pailoor, Jayalakshmi; Rajadurai, Pathmanathan

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자료유형: 학술저널

저자정보: Liam, Chong-Kin (Department of Medicine, Faculty of Medicine, University of Malaya) Leow, Hwong-Ruey (Department of Medicine, Faculty of Medicine, University of Malaya) How, Soon-Hin (Department of Internal Medicine, International Islamic University) Pang, Yong-Kek (Department of Medicine, Faculty of Medicine, University of Malaya) Chua, Keong-Tiong (Department of Medicine, Faculty of Medicine, University of Malaya) Lim, Boon-Khaw (Department of Medicine, Faculty of Medicine, University of Malaya) Lai, Nai-Lang (Department of Medicine, Faculty of Medicine, University of Malaya) Kuan, Yeh-Chunn (Department of Internal Medicine, International Islamic University) Pailoor, Jayalakshmi (Department of Pathology, Faculty of Medicine, University of Malaya) Rajadurai, Pathmanathan (Pathology Laboratory, Sime Darby Medical Centre)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제15권 제1호

발행연도: 2014.1

수록면: 321 - 326 (6page)

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Background: Mutations in the tyrosine kinase domain of the epidermal growth factor receptor (EGFR) in non-small cell lung cancer (NSCLC) are predictive of response to EGFR-targeted therapy in advanced stages of disease. This study aimed to determine the frequency of EGFR mutations in NSCLCs and to correlate their presence with clinical characteristics in multiethnic Malaysian patients. Materials and Methods: In this prospective study, EGFR mutations in exons 18, 19, 20 and 21 in formalin-fixed paraffin-embedded biopsy specimens of consecutive NSCLC patients were asessed by real-time polymerase chain reaction. Results: EGFR mutations were detected in NSCLCs from 55 (36.4%) of a total of 151 patients, being significantly more common in females (62.5%) than in males (17.2%) [odds ratio (OR), 8.00; 95% confidence interval (CI), 3.77-16.98; p<0.001] and in never smokers (62.5%) than in ever smokers (12.7%) (OR, 11.50; 95%CI, 5.08-26.03; p<0.001). Mutations were more common in adenocarcinoma (39.4%) compared to non-adenocarcinoma NSCLCs (15.8%) (p=0.072). The mutation rates in patients of different ethnicities were not significantly different (p=0.08). Never smoking status was the only clinical feature that independently predicted the presence of EGFR mutations (adjusted OR, 5.94; 95%CI, 1.94-18.17; p=0.002). Conclusions: In Malaysian patients with NSCLC, the EGFR mutation rate was similar to that in other Asian populations. EGFR mutations were significantly more common in female patients and in never smokers. Never smoking status was the only independent predictor for the presence of EGFR mutations.

#EGFR mutation #multiethnic #non-small cell lung cancer #smoking #Malaysian

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