Cancer recurrence means the cancer coming back after treatment; it comes from a small number of cancer cells that survived the first treatment and were too small to be seen on follow-up tests, and it does not mean the earlier treatment was wrong [1]. A recurrence may be local (in the same place), regional (in lymph nodes or nearby tissue) or distant (metastatic) [1]. Follow-up is usually a visit every 3 to 4 months for the first 2 to 3 years and then once or twice a year, but the exact plan depends on the type of cancer, the treatment and the person's health [2].
Why does cancer come back?
Recurrent cancer starts from cancer cells that the first treatment could not destroy completely. This does not mean the treatment was wrong; it just means a few cells survived that were too small to be seen on follow-up tests and gradually grew into a detectable tumour [1].
| Type of recurrence | What it means | Example |
|---|---|---|
| Local | The cancer is in the same place as the original cancer or very close to it | Cancer coming back in the treated breast |
| Regional | The tumour has reached lymph nodes or tissue near the original cancer | Involvement of nearby lymph nodes |
| Distant | The cancer has spread to distant organs or tissues (metastasis) | Colon cancer that recurs in the liver and is still called "colon cancer" |
What is follow-up after treatment like?
All cancer survivors should have regular follow-up and, at the end of treatment, receive a "follow-up plan" including a summary of treatment and further recommendations. How often you are seen depends on the type of cancer, the treatment received and your general health; in general, visits are every 3 to 4 months for the first 2 to 3 years and then once or twice a year. At these visits you are examined and, if needed, have blood tests and other checks [2].
Questions worth asking your doctor: which symptoms should I watch for? Which tests are needed, and how often? What long-term side effects might I have? How likely is my cancer to come back? [2]
For physicians
| Cancer | Source | Finding or recommendation |
|---|---|---|
| Breast | ASCO guideline | Examination every 3 to 6 months for the first 3 years, every 6 to 12 months in years 4 and 5, then yearly; yearly mammography; blood tests, bone scans, CT, PET, MRI and tumour markers are not recommended routinely in a patient without symptoms [4] |
| Colorectal | FACS trial (1202 patients) | Follow-up with CEA or CT increased the proportion of recurrences treated surgically with curative intent (6.7% to 8% vs 2.3%), but the number of deaths did not differ significantly [5] |
| Stage 2 and 3 colorectal | COLOFOL trial (2509 patients) | 5-year mortality was 13.0% with high-frequency follow-up and 14.1% with low-frequency follow-up; the difference was not significant [6] |
In some cancers the risk of recurrence persists for years. In a meta-analysis of 88 trials with 62,923 women with oestrogen receptor-positive breast cancer who were disease-free after 5 years of hormone therapy, the risk of distant recurrence over years 5 to 20 ranged from 10% to 41% depending on tumour size and the number of involved lymph nodes; for example 13% for small node-negative tumours and 41% for T2 tumours with 4 to 9 involved nodes [3].
What happens if the cancer comes back?
Many of the same tests done at diagnosis are repeated to find the site and extent of spread ("restaging"), and a new stage with the prefix "r" may be assigned, but the original stage does not change. Treatment options include surgery, chemotherapy, radiotherapy, biological therapies or a combination of these, and clinical trials, and palliative care is always available [1].
When should I call my doctor?
Related questions
Does recurrence mean the earlier treatment was wrong?
No. Recurrence means that a small number of cancer cells survived treatment and were too small to be seen [1].
Do more tests and scans help people live longer?
What is the difference between a recurrence and a second cancer?
A recurrence is the same cancer coming back; but sometimes a person who has had cancer develops a new type of cancer, which is called a "second primary cancer" [1].
Related cancer types
Related questions
References
7 referencesShow all references, 4 with a study cardClose the reference list
Numbers in the text, such as [1], refer to these sources. Sources with a “Study card” button are summarised in the site’s evidence library.
- 1
- 2
- 320-Year Risks of Breast-Cancer Recurrence after Stopping Endocrine Therapy at 5 Years
- 4Breast Cancer Follow-Up and Management After Primary Treatment: American Society of Clinical Oncology Clinical Practice Guideline Update
- 5Effect of 3 to 5 Years of Scheduled CEA and CT Follow-up to Detect Recurrence of Colorectal Cancer
- 6Effect of More vs Less Frequent Follow-up Testing on Overall and Colorectal Cancer–Specific Mortality in Patients With Stage II or III Colorectal Cancer
- 7Metastatic Cancer: When Cancer Spreads
This page is based on reputable scientific sources and was last updated on 28 October 2026. The content of this website is for educational and informational purposes only and does not replace consultation, diagnosis or treatment by a specialist physician. Consult your treating physician about any treatment decision.
Printed from the website; the full and up-to-date version: https://drdabiri.com/en/questions/what-is-cancer-recurrence/