Prospective Multicentre Study for the Application of Telomere Measurement Technology as a Tool for Lung Cancer Diagnosis

This study is testing whether measuring the length of telomeres — protective caps at the ends of chromosomes that shorten as cells age — in blood samples can help detect lung cancer earlier. Researchers hope this could become a simple blood-based screening tool. **You may be eligible if...** - You are 45 years or older - You have been newly diagnosed with small-cell or non-small-cell lung cancer and have not started treatment yet (case group) - OR you are a high-risk individual who smokes or has smoked heavily and has no cancer diagnosis (control group A) - OR you are a lower-risk individual with no cancer diagnosis (control group B) **You may NOT be eligible if...** - You have already started cancer treatment (surgery, chemotherapy, radiation, or immunotherapy) before sample collection - You are under 45 years old - You do not meet the risk profile for the control group you are being enrolled in Talk to your doctor to see if this trial is right for you.