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High frequency of EGFR mutations found in Asian population
Date:2/14/2014

DENVER Adenocarcinoma histology, female sex, never-smoking status, and Asian ethnicity have been considered the most important factors associated with EGFR mutations in non-small cell lung cancer and response to EGFR inhibitors. A recent study has found that, within the Asian population, the frequency of EGFR mutations associated with other demographic and clinical characteristics is higher than previously reported, even in patients with a history of smoking, suggesting that mutation testing should be done on a broader basis among Asian patients with advanced adenocarcinoma of the lung.

The PIONEER study is the first prospective, multinational epidemiologic study to document the frequency of EGFR mutations in lung adenocarcinoma in the Asian population. The PIONEER authors found that EGFR mutations were present in 51.4% of stage IIIB or IV adenocarcinomas of the lung among 1,450 patients from seven regions of Asia. Previous reports have suggested a frequency of approximately 30% among the Asian population (compared with 20% among the white population). The findings of the PIONEER study are published in the February issue of the International Association for the Study of Lung Cancer's journal, the Journal of Thoracic Oncology (JTO).

The frequency of EGFR mutations was high among women (61.1%) and never-smokers (60.7%), but EGFR mutations were also common among men (44%), occasional smokers (51.6%), and previous smokers (43.2%). With regard to Asian regions, the frequency was highest in Vietnam (64.2%) and lowest in India (22.2%).

"The frequency of EGFR mutations in demographic and clinical subgroups of Asian patients in PIONEER suggests that EGFR mutation testing should be considered for all patients with stage IIIB or IV adenocarcinoma of the lung in Asian populations," says first author Yuankai Shi, MD, of the Department of Medical Oncology, Cancer Institute/Hospital, Beijing, China. More widespread mutation testing would h
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Contact: Kristin Richeimer
kristin.richeimer@iaslc.org
720-325-2953
International Association for the Study of Lung Cancer
Source:Eurekalert

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