A Prospective Study for the Early Diagnosis of Lung Cancer in Korean Females

This study is looking for early-stage lung cancer in Korean women who have never smoked but have a family history of lung cancer. Non-smoking women with a family history of lung cancer are a high-risk group that is often missed by standard screening programs designed for heavy smokers. **You may be eligible if...** - You are a Korean woman between 45 and 74 years old - You have never smoked (fewer than 100 cigarettes in your lifetime) - You have a first-degree relative (parent, sibling, or child) who has been diagnosed with lung cancer **You may NOT be eligible if...** - You have a prior history of lung cancer - You have been diagnosed with any other cancer within the past 5 years - You are currently participating in another cancer prevention study - You currently have symptoms that suggest possible lung cancer (e.g., unexplained cough, weight loss) Talk to your doctor to see if this trial is right for you.