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After surgery

Your lung cancer has been removed. What happens in follow-up?

Written and medically reviewed by Dr. Kashif Irshad, MD, MSc, FRCSC · Last reviewed October 2026

In short: After surgery for non-small cell lung cancer, follow-up is about two things: catching any recurrence early, and finding a new, second lung cancer while it is still small and treatable. My usual plan is a CT scan of the chest every 6 months for the first 2 years, then once a year after that. This matches the American Society of Clinical Oncology (ASCO) guideline. If the pathology shows a more aggressive-looking cancer or involved lymph nodes, I may scan more often at first, sometimes every 3 months. Routine PET scans, brain MRI and blood tumour markers are not recommended for people without symptoms.

“Is that it? Am I cured?” is usually the first question after the pathology results come back. For most people with early-stage lung cancer, surgery offers the best chance of cure. Having had one lung cancer, though, means you need a careful plan for the years that follow. Here is how I approach it, and the evidence behind it.

Why follow-up matters

There are two separate risks after lung cancer surgery:

  • Recurrence: the original cancer coming back, either in the chest or elsewhere. In a large study of 1,294 patients followed with routine CT after surgery for early-stage lung cancer, the risk of recurrence was about 6–10% per year for the first four years, falling to about 2% per year after that.1
  • A second, new lung cancer: because the lungs were exposed to the same risk factors, people who have had one lung cancer are at higher risk of developing another. In the same study, new lung cancers appeared at 3–6% per year, and that risk did not fall over time.1
6–10%yearly risk of recurrence in the first 4 years after surgery1
3–6%yearly risk of a new lung cancer, which does not decline with time1
93%of second lung cancers in that study were found by routine CT1

The first risk is why follow-up is more frequent in the early years. The second is why it continues for life.

My usual follow-up schedule

Years 1–2

CT every 6 months

A chest CT, together with a clinic visit to review symptoms, recovery and breathing.

Year 3 onward

CT once a year

An annual chest CT, often low-dose, mainly to watch for a new lung cancer.

Higher-risk pathology

CT as often as every 3 months

For a more aggressive-looking cancer or lymph node involvement, I may scan more often at first.

This is close to what the major guidelines recommend. ASCO advises a chest CT, preferably with contrast and including the adrenal glands, every 6 months for the first 2 years, then a low-dose CT every year to look for new lung cancers.2 The U.S. National Comprehensive Cancer Network (NCCN) gives similar advice: a clinic visit and chest CT every 6 months for 2–3 years, then annually.3

Why I sometimes scan more often

Not every lung cancer behaves the same way. The pathology report tells me a great deal about how likely a cancer is to come back. Features that raise that risk include lymph node involvement, cancer cells in small blood or lymph vessels, and certain growth patterns. One such pattern is spread through air spaces (STAS), where small clusters of tumour cells are found in the air spaces beyond the edge of the tumour. In one study of small stage I adenocarcinomas removed by limited resection, recurrence at five years was 42.6% with STAS versus 10.9% without it.4

When I see features like these, I may tighten the schedule to a CT every 3 months for a period before stepping back to every 6 months. A follow-up plan should be tailored to your own cancer, not taken from a template.

Does CT follow-up actually help?

This has been studied directly. In the French IFCT-0302 trial, 1,775 patients who had their lung cancer completely removed were followed either with chest CT scans or with chest X-rays alone, every 6 months for 2 years, then yearly to 5 years.5

  • Overall survival was similar in the two groups.
  • CT found recurrences before symptoms appeared more often: 38% of recurrences were found without symptoms in the CT group, compared with 17.5% in the X-ray group.
  • CT was much better at finding new lung cancers early: 82.5% of second primaries in the CT group were found before any symptoms, compared with 48% with X-rays.

A new lung cancer found early can often be treated again with surgery or focused radiation, with a real chance of cure. That is the main reason I continue an annual CT for the long term. The trade-off is that CT also finds small spots that turn out to be harmless. In the large U.S. study, a quarter of patients needed extra tests at some point for a false alarm, although serious complications from those tests were rare (0.3%).1

What is not routinely recommended

  • PET scans for routine follow-up: they add radiation and cost and often give false positives. They are used if something suspicious appears.2
  • Brain MRI for routine follow-up of non-small cell lung cancer without symptoms.2
  • Blood tumour markers as a surveillance test.2

What you can do between scans

  • Stop smoking, if you still smoke. It is never too late. In a review of early-stage lung cancer, continuing to smoke after diagnosis was linked to about twice the risk of recurrence and nearly three times the risk of death.6
  • Stay active. Walking and breathing exercises help the remaining lung recover. I cover this in the recovery guide.
  • Tell us about new symptoms without waiting for your next scan: a new or changing cough, coughing up blood, chest or bone pain, persistent headaches, or unexplained weight loss.
  • Keep up with any additional treatment. Depending on your stage and the results of tumour testing, you may be offered chemotherapy, immunotherapy or a targeted drug after surgery. See Lung cancer treatment by stage.
The takeaway: after lung cancer surgery, plan on a chest CT every 6 months for 2 years, then every year after that. If your pathology shows higher-risk features, your schedule may be more frequent at first. The early scans look for recurrence, and the long-term scans look for a new lung cancer while it is still small and treatable.

Recently diagnosed, or looking for a second opinion? Read about lung cancer surgery or see the referral information.

Common questions

How often should I have a CT scan after lung cancer surgery?
Most guidelines recommend a chest CT every 6 months for the first 2 years after surgery, then once a year. Your surgeon may recommend scans more often, for example every 3 months at first, if the pathology shows higher-risk features.
Why do I need scans every year after the first two years?
After the first few years the risk of the original cancer coming back falls, but the risk of a new, second lung cancer stays at about 3–6% per year. An annual CT helps find a new cancer while it is small and can often be treated again.
Do I need a PET scan or brain MRI as part of follow-up?
Not routinely. ASCO recommends against routine PET scans, brain MRI and blood tumour markers for follow-up after curative treatment of non-small cell lung cancer. They are used if symptoms or a CT finding raise a concern.
What are the chances of lung cancer coming back after surgery?
It depends on the stage and features of the cancer. In one large study of early-stage lung cancer, about 20% of patients had a recurrence during follow-up, with the highest risk in the first four years. Your surgeon can give you a more personal estimate based on your pathology.
Which symptoms should I report between scans?
A new or changing cough, coughing up blood, new chest or bone pain, persistent headaches, shortness of breath that is getting worse, or unexplained weight loss. Don’t wait for your next scheduled scan.
Dr. Kashif Irshad
Dr. Kashif Irshad, MD, MSc, FRCSCThoracic surgeon. This article is general information, medically reviewed October 2026. About Dr. Irshad →
Related Lung cancer surgery Treatment by stage Recovery after lung surgery Lung cancer in never-smokers

References

  1. Lou F, Huang J, Sima CS, Dycoco J, Rusch V, Bach PB. Patterns of recurrence and second primary lung cancer in early-stage lung cancer survivors followed with routine computed tomography surveillance. J Thorac Cardiovasc Surg. 2013;145(1):75–82.
  2. Schneider BJ, Ismaila N, Aerts J, et al. Lung cancer surveillance after definitive curative-intent therapy: ASCO guideline. J Clin Oncol. 2020;38(7):753–766.
  3. National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology: Non-Small Cell Lung Cancer (surveillance section).
  4. Kadota K, Nitadori JI, Sima CS, et al. Tumor spread through air spaces is an important pattern of invasion and impacts the frequency and location of recurrences after limited resection for small stage I lung adenocarcinomas. J Thorac Oncol. 2015;10(5):806–814.
  5. Westeel V, et al. Chest CT scan plus x-ray versus chest x-ray for the follow-up of completely resected non-small-cell lung cancer (IFCT-0302): a multicentre, open-label, randomised, phase 3 trial. Lancet Oncol. 2022;23(9):1180–1188.
  6. Parsons A, Daley A, Begh R, Aveyard P. Influence of smoking cessation after diagnosis of early stage lung cancer on prognosis: systematic review of observational studies with meta-analysis. BMJ. 2010;340:b5569.

Questions about your follow-up plan?

A referral from your family doctor or specialist is all that’s needed to be seen.

Referral information →

This article is general information and is not a substitute for individual medical advice. Your follow-up schedule should be set by your own care team.