If you have non-small-cell lung cancer (NSCLC), your cancer might carry certain changes, or mutations, in your EGFR gene. Those changes make the protein made from this gene act in ways it shouldn’t.
Epidermal growth factor receptor (EGFR) is a protein on the surface of your cells that helps them grow. When the gene that codes for EGFR has a mutation, it affects the way this protein works ...