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Patient education: Non-small cell lung cancer (The Basics)

Patient education: Non-small cell lung cancer (The Basics)

What is non-small cell lung cancer? — Non-small cell lung cancer is 1 type of lung cancer. Lung cancer happens when normal lung cells change into abnormal cells and grow out of control (figure 1). There are different types of lung cancer. Some types grow faster than others.

Non-small cell lung cancer is the most common type of lung cancer. It does not usually grow as fast as another type of lung cancer called small cell lung cancer.

What is lung cancer staging? — Cancer staging is a way in which doctors find out how far in your body a cancer has spread. To describe how far a person's non-small cell lung cancer has spread, doctors call it stage 1, 2, 3, or 4. These are also written as stage I, II, III, or IV.

Sometimes, staging can be tricky. For example, your doctor might think that you have stage 1 or stage 2 cancer. But after you have surgery, your doctor might check the tissues you had removed and discover that you really have stage 3 cancer.

Here are some of the main differences between the stages:

In stage 1, the lung cancer is in either the left or right lung. It has not spread outside of the lung or to any lymph nodes. (Lymph nodes are bean-shaped organs that are part of the body's infection-fighting system.) Stage 1 cancers are usually small.

In stage 2, the cancer has spread to other parts of the lung, such as lymph nodes in the lung or the lining around the lung. Stage 2 cancers can be different sizes.

In stage 3, the cancer might be large. Or it might have spread to lymph nodes in the middle of the chest, between the left and right lungs.

In stage 4, the cancer has spread to the other lung or to other parts of the body, such as the brain or bones. Also, lung cancer is described as stage 4 if it causes fluid to collect around the outside of the lungs.

Your treatment will depend a lot on the stage of your lung cancer.

How are stage 1 and stage 2 non-small cell lung cancers treated? — People with stage 1 or stage 2 non-small cell lung cancer are usually first treated with surgery to remove the cancer. To remove the cancer, a doctor might remove part of a lung. Or they might need to remove the whole lung. (People who have 1 lung removed can use their other lung to breathe.)

People with stage 1 lung cancer might not need any other treatment after surgery. But people with stage 2 lung cancer usually need more treatment after surgery. This can include:

Radiation therapy – Radiation kills cancer cells. Some people who do not want surgery or who cannot have surgery have radiation therapy instead.

Chemotherapy – Chemotherapy is the medical term for medicines that kill cancer cells or stop them from growing.

Other treatments – Depending on the characteristics of your cancer, you might get other treatments. One example is immunotherapy, which means medicines that work with the body's infection-fighting system to stop cancer growth. Another is targeted therapy, which means medicines that work for cancers with certain characteristics. Your doctor might do tests to find out if these treatments might work for your cancer.

Sometimes, people with stage 1 or stage 2 cancer are treated with radiation therapy rather than surgery. This might be the case if they have other problems that prevent them from having surgery.

How is stage 3 non-small cell lung cancer treated? — Doctors can treat stage 3 non-small cell lung cancer in different ways. Treatment depends on where the cancer is, how big it is, and which treatments a person has already had.

People with stage 3 lung cancer usually have 1 or more of the following treatments:





Doctors also treat another type of lung cancer, called a "Pancoast tumor," using some of these treatments. A Pancoast tumor is a lung cancer that grows in the top part of the lung.

How is stage 4 non-small cell lung cancer treated? — There is no treatment that will cure stage 4 non-small cell lung cancer. But different treatments can reduce symptoms and help people live longer. People with stage 4 lung cancer can have 1 or more of the following treatments:


Targeted therapy


Surgery to remove a cancer growth that is outside of the lungs

Treatment for symptoms caused by the cancer – For example, if you have trouble breathing because fluid has collected around your lungs, your doctor can drain the fluid to help you breathe more easily.

Radiation therapy

What happens after treatment? — After treatment, your doctor will check every so often to see if your lung cancer has come back. Follow-up tests usually include exams and imaging tests such as chest X-rays or CT scans. Imaging tests can create pictures of the inside of the body.

What happens if the lung cancer comes back? — If the lung cancer comes back, you might have chemotherapy, targeted therapy, radiation, or surgery.

What if I smoke? — If you smoke, try to quit. People who survive lung cancer have a greater chance of getting lung cancer again if they smoke.

What else should I do? — Follow all of your doctor's instructions about visits and tests. It's also important to talk to your doctor about any side effects or problems you have during treatment.

Getting treated for lung cancer involves making many choices, such as what treatment to have and when.

Always let your doctors and nurses know how you feel about a treatment. Any time you are offered a treatment, ask:

What are the benefits of this treatment? Is it likely to help me live longer? Will it reduce or prevent symptoms?

What are the downsides to this treatment?

Are there other options besides this treatment?

What happens if I do not have this treatment?

More on this topic

Patient education: Lung cancer (The Basics)
Patient education: Quitting smoking (The Basics)
Patient education: Endobronchial ultrasound (The Basics)

Patient education: Non-small cell lung cancer treatment; stage I to III cancer (Beyond the Basics)
Patient education: Non-small cell lung cancer treatment; stage IV cancer (Beyond the Basics)
Patient education: Lung cancer risks, symptoms, and diagnosis (Beyond the Basics)
Patient education: Lung cancer prevention and screening (Beyond the Basics)
Patient education: Small cell lung cancer treatment (Beyond the Basics)
Patient education: Quitting smoking (Beyond the Basics)

This topic retrieved from UpToDate on: Jun 02, 2024.
Disclaimer: This generalized information is a limited summary of diagnosis, treatment, and/or medication information. It is not meant to be comprehensive and should be used as a tool to help the user understand and/or assess potential diagnostic and treatment options. It does NOT include all information about conditions, treatments, medications, side effects, or risks that may apply to a specific patient. It is not intended to be medical advice or a substitute for the medical advice, diagnosis, or treatment of a health care provider based on the health care provider's examination and assessment of a patient's specific and unique circumstances. Patients must speak with a health care provider for complete information about their health, medical questions, and treatment options, including any risks or benefits regarding use of medications. This information does not endorse any treatments or medications as safe, effective, or approved for treating a specific patient. UpToDate, Inc. and its affiliates disclaim any warranty or liability relating to this information or the use thereof. The use of this information is governed by the Terms of Use, available at https://www.wolterskluwer.com/en/know/clinical-effectiveness-terms. 2024© UpToDate, Inc. and its affiliates and/or licensors. All rights reserved.
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