Rare EGFR Variant Tied to 25-Fold Lung Cancer Risk in Never-Smokers

Two new reports highlight a rare inherited EGFR mutation as a possible explanation for lung cancer in people who have never smoked. Both Fierce Biotech and STAT describe the variant as very rare and associated with a roughly 25-fold increase in lung cancer risk.

The reports agree that the effect is large compared with smoking: Fierce Biotech notes that smoking alone increased risk by about 4 times in the same context. Because the variant is germline, it is inherited rather than acquired, which could make it a useful marker for identifying high-risk never-smokers.

There is a small discrepancy in how the risk is framed. Fierce Biotech's headline says the mutation increases lung cancer risk 62 times in never-smokers, while the body of that report and STAT both cite a 25-fold increase. The excerpts do not explain the relationship between those figures, so the 62-fold number should be treated as a headline claim rather than a separate finding.