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Characteristics of lung cancers arising in germline EGFR T790M mutation carriers
Date:3/21/2014

DENVER Two studies are providing new insight into germline epidermal growth factor receptor (EGFR) T790M mutation in familial non-small cell lung cancer (NSCLC). The findings suggest the need for tailored approaches for early detection and treatment, as well as for genetic testing to identify carriers.

"These studies now solidify the fact that routine clinical management of lung cancer now has to include the awareness of this inherited cancer syndrome," wrote David P. Carbone, MD, PhD, President-Elect of the International Association for the Study of Lung Cancer (IASLC), in an editorial. The editorial accompanies the two articles in the April issue of the Journal of Thoracic Oncology, the official journal of the IASLC.

In one of the two studies, researchers found that germline EGFR T790M mutation results in a rare and unique lung cancer hereditary syndrome associated with an estimated 31% risk for the disease in never-smokers. Lead author Adi Gazdar, MD, of the Department of Pathology, UT Southwestern Medical Center, Dallas, TX, and colleagues studied a family with germline EGFR T790M mutations over five generations (14 individuals) and combined their observations with data obtained from a literature search (15 individuals). They found that the mutation occurred in approximately 1% of NSCLCs and in less than one in 7,500 subjects without lung cancer.

Female never-smokers were overrepresented in the family cohort. Among 13 patients for whom gender and smoking status were known, nine were female never-smokers, two were male never-smokers, and two were ever-smokers (one male and one female).

"The risk of lung cancer development in never-smoking carriers is greater than the risk of heavy smokers with or without the mutation," says Dr. Gazdar, who is an IASLC member. "Unaffected carriers with this mutation are at increased risk for the development of lung cancer irrespective of their smoking status and should be follo
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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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