EGFR Mutation Linked to Higher Lung Cancer Risk
Researchers identified a genetic variant that significantly increases lung cancer risk in specific populations.
Updated on Sept. 18, 2026 in Cancer
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A study published in Science found that carriers of the EGFR T790M genetic mutation face a substantially higher risk of developing lung cancer. Researchers tracked the mutation to its arrival in the Southern Appalachian region 200 years ago.
Why it matters
Identifying this specific genetic mutation allows researchers to better understand inherited cancer risks independent of environmental factors. These findings could eventually refine how medical providers determine eligibility for high-risk CT screening programs.
The mutation occurs in 1 in 15,850 participants among over 3.3 million analyzed samples, appearing in 1 in 8,920 people of British, Irish, African, and Indigenous American descent. Tobacco smoking remains responsible for 80 percent of all lung cancer deaths.
The players
American Cancer Society
This nationwide voluntary health organization is dedicated to eliminating cancer through research, education, and patient support.
Science
This peer-reviewed academic journal is the primary publication of the American Association for the Advancement of Science.
The details
Researchers analyzed genetic and health data from more than 3.3 million genotyped samples to establish the link between the EGFR T790M mutation and lung cancer. The study traces the mutation back to European origins before its arrival in the United States.
Timeline
The EGFR T790M mutation arrived in the Southern Appalachian region in 1826.
The study and associated lung cancer projections were published in 2026.
The Big Picture
The current research on genetic variants extends the foundational screening protocols previously established by the National Lung Screening Trial.
This study does not change immediate medical guidelines but may eventually shift how clinicians assess individual cancer risks during routine checkups. Patients with a known family history of early-onset lung cancer should consult with their doctor regarding potential screening options.
The takeaway
Genetic screening is becoming a vital tool in identifying cancer risks that exist independently of common environmental factors like tobacco use. Understanding these inherited markers can help patients and doctors move toward more personalized preventative healthcare plans.
What happens next
Researchers are planning follow-up studies to investigate how lung cancer risk for mutation carriers changes with age and to determine the lifetime risk for those who carry the variant.
Further reading
For more information on current diagnostic developments, see the United States Cancer section.
More information
Read the full Science journal study on mutation.
Live Poll
If you knew you had a high genetic risk for cancer, would you seek regular screenings?
