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Active Surveillance: When Doctors Choose to Watch Instead of Treat
By Dr. Gajendra Kumar Himanshu
Active surveillance is a structured way for doctors to monitor certain cancers closely without starting treatment straight away. The patient has regular tests, scans and sometimes biopsies to look for signs that the cancer is changing or growing. If there is evidence of progression, treatment can then be started. This approach can help some patients avoid or delay side effects from surgery, radiation or other therapies.
In this blog, we discuss active surveillance, why doctors may suggest watching instead of treating straight away, which cancers may be suitable for it, how patients are monitored and what changes might mean it is time for treatment. We also explain how active surveillance differs from watchful waiting and what patients should discuss with their doctor.
Why Active Surveillance Is Used
Some cancers do not need to be treated immediately after they are found. Certain cancers grow so slowly that they may never cause significant symptoms or affect a person's health during their lifetime. In these situations, early surgery, radiation or drug treatment may cause side effects without adding much benefit.
Active surveillance is a carefully considered option for selected patients. It does not mean ignoring the cancer or hoping it goes away. Instead, doctors monitor the condition closely and are ready to treat it if testing shows that it is becoming more aggressive.
This approach is particularly well established in some low-risk prostate cancers, where many people can safely delay treatment while still keeping the option of curative therapy if the disease progresses.
What Does Active Surveillance Mean?
Active surveillance involves closely monitoring a patient's condition without starting treatment unless the monitoring shows that the cancer is progressing. The idea is to detect significant changes early and to postpone or avoid treatments that may cause serious side effects.
How Is Active Surveillance Different From Immediate Treatment?
Immediate treatment means that doctors aim to remove or control the cancer soon after diagnosis. Active surveillance means watching the disease closely and delaying treatment until it is needed.
The key point is that active surveillance is a planned medical strategy with a clear follow-up schedule. It is not the same as simply being told to come back if symptoms appear.
Which Cancers May Be Managed With Active Surveillance?
Not all cancers are suitable for active surveillance. It is most useful when doctors have good reason to believe that a particular cancer is unlikely to progress quickly and that it is safe to wait before starting treatment.
Prostate Cancer
Active surveillance is a well-established strategy, particularly for certain men with low-risk, localised prostate cancer. Monitoring may involve regular prostate-specific antigen (PSA) tests, examinations, imaging and repeat biopsies. Treatment may be started if there is evidence that the cancer is progressing.
This may help some people avoid or delay problems associated with definitive treatment, such as urinary symptoms, bowel symptoms or sexual side effects.
Other Cancers
Active surveillance may also be used in selected situations for other cancers. The decision depends on the particular cancer, its biology, stage, test results and the evidence supporting observation.
Because suitability for active monitoring varies a great deal between cancer types, a patient should not assume that active surveillance is appropriate simply because the cancer appears small.
What Happens During Active Surveillance?
Active surveillance is a process of regular monitoring designed to detect significant changes as early as possible.
Regular Testing and Assessments
Follow-up care depends on the type of cancer and may include blood tests, imaging scans, physical examinations and biopsies. For prostate cancer, PSA testing and repeat biopsies are commonly used to monitor how the disease is behaving.
The schedule is tailored to the individual. Some people may need testing more frequently in the first few years, while for others the gap between tests may be longer if the condition remains stable.
What Happens If the Cancer Changes?
If tests suggest that the cancer is growing, becoming more aggressive or showing other concerning changes, the medical team may recommend starting active treatment.
Treatment will depend on the cancer and may include surgery, radiation therapy, systemic drugs or another cancer-specific approach. The aim of active surveillance is therefore not to delay treatment indefinitely, but to avoid unnecessary treatment while the cancer is being carefully monitored.
What Are the Benefits of Active Surveillance?
The greatest potential advantage is avoiding or postponing treatment-related side effects when immediate therapy is not needed.
Surgery, radiation and systemic treatments can affect quality of life in many ways. By delaying treatment in selected patients, active surveillance can allow them to continue their usual activities for longer while keeping treatment options open if the disease progresses.
It can also help reduce unnecessary treatment for cancers that remain stable for several years.
What Are the Risks and Limitations?
Active surveillance is not risk-free. There is a small chance that a cancer could progress between monitoring visits, or that changes could be detected later than would be ideal.
It can also cause emotional stress because of the regular testing. Some patients find it difficult to live with the knowledge that cancer is still in the body, even when doctors feel that immediate treatment is not needed.
Careful patient selection and reliable follow-up are therefore essential. Active surveillance works only when patients understand the monitoring schedule and attend their appointments consistently.
Active Surveillance and Watchful Waiting: What Is the Difference?
These two terms are often used interchangeably, but they have different aims.
Active Surveillance
Active surveillance is usually intended to delay treatment while keeping the option of curative therapy if the cancer shows evidence of progression. Changes in the disease are detected through regular testing.
Watchful Waiting
Watchful waiting generally involves less intensive monitoring. Treatment is often started when symptoms develop or change, with the emphasis on controlling symptoms and maintaining quality of life rather than following the disease closely with curative treatment in mind.
This difference matters particularly in prostate cancer, where doctors may choose one approach over the other depending on a man's age, health, disease features and treatment goals.
Who Is a Good Candidate for Active Surveillance?
Doctors consider several factors before recommending this approach. These can include the type of cancer, tumour grade, stage, size, biomarkers, imaging findings, overall health and the expected risk of progression.
Patient preference also matters. Some people would prefer to avoid treatment until it becomes necessary, while others feel more comfortable having the cancer removed or treated straight away.
The decision should be made together with the treating specialist after discussing the possible benefits, risks and alternatives.
For more information regarding active surveillance, visit the National Cancer Institute.
Consult Today
If you have been diagnosed with a cancer that may be suitable for active surveillance, working with an experienced oncology team can help you review all the treatment options and make an informed decision. At Oncare Cancer Hospital, patients can discuss the features of their cancer, monitoring options and treatment plan with the specialist team, based on their particular condition and preferences.
Disclaimer
This blog is for general information only and is not intended as medical advice, diagnosis or treatment. Active surveillance is suitable only for certain cancers and certain patients. Consult an experienced oncologist to find out whether it is appropriate in your case.
Frequently Asked Questions
Active surveillance is a planned strategy in which doctors monitor a cancer with regular tests and examinations instead of starting treatment straight away. Treatment is started when monitoring shows evidence that the disease is progressing.
No. Active surveillance involves regular tests and frequent appointments with your doctor. The aim is to detect concerning changes early while avoiding or postponing treatment that may not be needed immediately.
Active surveillance is well established for selected low-risk, localised prostate cancers. It may also be appropriate for some other cancers or clinical situations, depending on the features of the disease.
Yes. One of the main aims of active surveillance is to identify progression early enough to start treatment when it is required. Treatment depends on the type and stage of the cancer and may include surgery, radiation or drug therapy.
Written and Verified by:
Dr. Gajendra Kumar Himanshu Exp: 10 Yr
Medical Officer
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