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A lung screening test is a quick, painless scan (usually a low-dose CT scan) that looks for early signs of lung cancer in people who are at high risk. It can find cancer when it's small and easier to treat.
Key facts
Lung screening is recommended for certain groups of people, such as those aged 55 to 80 with a heavy smoking history. Not everyone needs it, and your doctor can help decide if it's right for you.
It mainly affects people who have smoked many cigarettes for many years, or who stopped smoking within the last 15 years. Other risk factors include exposure to radon, asbestos, or a family history of lung cancer.
Lung screening is not a diagnosis of lung cancer. It is a test to look for possible signs of cancer. If the scan shows something abnormal, you will need follow-up tests such as another scan or a biopsy.
You will lie on a narrow table that slides through a large, donut-shaped machine. You will need to hold your breath for a few seconds while the scan is taken. The whole test takes about 10 to 15 minutes. There is no pain, and you can go back to normal activities right away.
If your lung screening test finds a suspicious spot, your doctor will explain the next steps. Treatment for lung cancer depends on the type and stage. Options may include surgery, radiation, or medicines that target cancer cells.
Treatments for lung cancer can include surgery to remove the cancer, radiation therapy to destroy cancer cells, and medicines such as chemotherapy or immunotherapy. Your care team will recommend a plan based on your specific situation.
Surgery may be an option if the cancer is found early and has not spread. The type of surgery depends on the size and location of the tumour.
If you have had a lung screening test and are waiting for results, try to keep up your normal routines. If more tests are needed, your doctor will guide you through each step. Remember that most abnormal findings turn out not to be cancer.
Eating plenty of fruits, vegetables, and whole grains can help your body stay strong. Gentle exercise like walking can improve your mood and lung function. Always talk to your doctor before starting a new exercise programme.
Waiting for screening results or follow-up tests can be stressful. It is normal to feel anxious or worried. Talk to your doctor or a counsellor if you need support. Remember that early detection gives you the best chance of effective treatment.
Lung cancer cannot always be prevented, but you can lower your risk by not smoking, avoiding second-hand smoke, and limiting exposure to harmful chemicals and radon.
Lung screening tests are used to find lung cancer early, not to prevent it. However, early detection can prevent the cancer from growing and spreading. Discuss with your doctor if screening is appropriate for you.
When lung cancer is caught early through screening, the chances of successful treatment are much higher. Many people with early-stage lung cancer live long, healthy lives. Even if cancer is advanced, treatments are improving all the time and can help control the disease.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.