Did genetic mutations cause lung cancer in my husband at 40?
Patient's Query
Hello doctor,
I cannot stop thinking about why a 40-year-old non-smoker would be diagnosed with advanced stage 4 lung cancer. My husband is that person, and we are completely shattered. He has never smoked a single cigarette in his life, exercises regularly, eats healthily, and has no family history of anything serious.
His first symptom was a persistent cough, which we thought was due to seasonal allergies. By the time the CT scan and PET scan were done, the lung cancer had already spread to his liver and adrenal glands.
His oncologist ordered comprehensive genomic profiling and found an EGFR exon 19 deletion mutation. He has now started on osimertinib 80 mg daily.
What we do not understand is how someone so young and healthy develops such aggressive lung cancer without any obvious risk factors. Could environmental exposures, such as air pollution or radon gas at home, be responsible?
We live near an industrial area, so I am now worried about that. His ALT levels are slightly elevated at 52, and his oncologist is monitoring his liver closely. Can the mutation alone explain this without any lifestyle factors?
Please help.
Thank you.
Hello,
Welcome to icliniq.com.
I understand your concern.
First of all, I am very sorry that you and your husband are facing such a difficult and unexpected diagnosis. It is completely understandable to wonder how lung cancer could occur in someone who never smoked and otherwise appeared healthy.
Lung cancer in non-smokers does occur, and in many cases, it is driven by specific genetic changes inside the cancer cells. The EGFR (estimated glomerular filtration rate) exon 19 deletion found in your husband’s testing is one of the most common examples.
These mutations usually arise spontaneously in lung cells and begin driving abnormal cell growth. In many patients, there is no clear lifestyle cause, so it is important to understand that this diagnosis is not something your husband could have prevented.
Environmental exposures such as long-term air pollution, indoor radon gas, second-hand smoke, or certain industrial pollutants may increase lung cancer risk in some people.
However, in individual cases, it is often difficult to identify one definite cause. Many patients with EGFR-mutated lung cancer have no obvious exposure history.
In fact, the presence of an EGFR exon 19 mutation is helpful from a treatment point of view. Drugs like Osimertinib are intended to act as inhibitors for the abnormal signal formed due to the presence of such a mutation. In fact, most people achieve good control of their disease through this treatment approach.
Regarding the ALT(alanine aminotransferase) value of 52, this represents a mild elevation. This can occur due to liver involvement by the cancer or occasionally as a medication effect. Regular monitoring of liver function, as your oncologist is doing, is the appropriate approach.
I hope this helps.
Kindly follow up if you have more concerns.
Thank you.
Same symptoms don't mean you have the same problem. Consult a doctor now!
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