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If you or someone you love has cancer, the most important treatment decisions belong with a qualified oncology team. Surgery, radiotherapy, chemotherapy, targeted drugs and approved immunotherapies are the treatments with proven survival benefit for many cancers. Nothing on this page is a substitute for them.
We only discuss immune cell therapy as possible supportive care, with your oncologist informed, and we will decline when it is not appropriate or could interfere with your treatment.
What is immune cell therapy?
Immune cell therapy (also called adoptive cell therapy) means collecting immune cells, growing or modifying them in a laboratory, and infusing them back to help the immune system recognise and attack cancer cells. The US National Cancer Institute explains immunotherapy types clearly.
Main types:
| Type | What it is | Status |
|---|---|---|
| CAR-T cell therapy | Patient’s T cells engineered to target a cancer marker | Approved for certain leukaemias, lymphomas and myeloma; given in specialist hospitals. NCI |
| Checkpoint inhibitors | Drugs (not cells) that release brakes on the immune system | Approved for many cancers |
| NK (natural killer) cell therapy | Expanded NK cells from patient or donor | Investigational; many clinical trials |
| CAR-NK | Engineered NK cells | Early clinical trials |
| CIK / DC-CIK and similar | Mixed immune cell preparations | Investigational; mainly studied in Asia |
How do NK cells work?
Natural killer cells are part of the innate immune system. They can recognise and destroy some abnormal cells, including virus-infected and tumour cells, without prior sensitisation. Many cancers develop ways to evade NK cells, and NK cell activity can be reduced by cancer and its treatment. The idea behind NK therapy is to collect NK cells, expand and activate them in a laboratory, and return them in larger numbers.
What does the evidence show?
- Blood cancers: NK cells have been studied, especially around stem cell transplantation, with some encouraging trial results. PubMed
- Solid tumours: results are limited. The tumour environment suppresses NK cells and they often do not reach tumours in large numbers. Most published human data come from small, early-phase studies.
- Engineered CAR-NK cells: promising early results in some blood cancers; still in trials.
- Quality of life: some small studies report patient-reported benefits, but these are hard to separate from other factors.
There is no reliable evidence that private, unmodified NK cell infusions improve survival for solid cancers. We will say this clearly in any consultation.
Who might discuss immune cell therapy?
- Patients under active care of an oncologist who want an evidence-based second opinion on experimental supportive options.
- Patients who have completed standard treatment and want to understand research options, including clinical trials in their home country.
- Patients whose oncologist is aware and does not object.
Who should not have it?
- Anyone being asked to stop or delay standard oncology treatment.
- Patients with uncontrolled infection, very low blood counts or organ failure.
- Patients on treatments where an immune cell infusion could interact or cause harm, unless the oncology team agrees.
- Pregnancy.
- Anyone expecting a cure.
Risks and side effects
Reported side effects of NK infusions include fever, chills, fatigue and infusion reactions. Engineered cell therapies such as CAR-T can cause serious complications, including cytokine release syndrome and neurological effects, which is why they are given in specialist centres. Any cell product carries risks of contamination if poorly manufactured. Travel itself can be risky for patients with active cancer, for example due to blood clot risk.
Clinical trials: often the better route
For many people with cancer, a registered clinical trial is the safest way to access new cell therapies. Trials have independent ethics oversight, defined safety monitoring, and often provide the therapy without charge. Your oncologist can help you find trials suited to your cancer type, stage and previous treatments. If you are travelling for care, ask whether trials in your home country could be an alternative before choosing private experimental treatment abroad.
Questions to ask any clinic offering cancer cell therapy
- Is this an approved treatment or experimental? For which cancer?
- What published human evidence supports this for my cancer type and stage?
- Will you communicate with my oncologist?
- Is this part of a registered clinical trial? (You can search trials at ClinicalTrials.gov, run by the US NIH.)
- How are the cells manufactured, tested and released?
Walk away from any provider who promises a cure, discourages standard treatment, or pressures you to decide quickly. See our clinic checklist.
How a review works
- WhatsApp consultation. Tell us the cancer type, stage and current treatment.
- Send your reports: pathology, latest scans, oncology letters and blood tests.
- Doctor review. A doctor reviews your records. Often the honest advice is to continue standard care, consider a clinical trial, or that cell therapy is not appropriate.
- If supportive therapy is reasonable, you receive a written plan with risks, evidence and a quote, and we ask that your oncologist is informed.
- Treatment days include assessment, blood tests, and cell collection or infusion as planned.
- Follow-up on WhatsApp, with a written summary for your oncology team.
Safety and laboratory quality
Cells are prepared in ISO 9001:2015-certified partner laboratories. Ask for documentation of sterility testing and cell characterisation for any product. Treatment is supervised by Thai Medical Council-licensed doctors.
Regulatory note
In the US, UK and Australia, NK cell therapy outside clinical trials is not approved. Please also read our medical disclaimer and referral disclosure.
Frequently asked questions
Can NK cell therapy cure cancer?
No private NK cell therapy has been shown to cure cancer. Research is promising in some areas, especially engineered NK cells in clinical trials, but outside trials it should be seen as experimental support alongside standard oncology care.
Is NK cell therapy approved?
Unmodified NK cell infusions are not approved by the FDA, TGA or MHRA for treating cancer. Approved cell therapies include certain CAR-T products for specific blood cancers, given in specialist hospital centres.
Should I stop chemotherapy for immune cell therapy?
No. Never stop or delay treatment recommended by your oncologist. Any immune cell therapy we discuss is considered only as support, with your oncologist informed and in agreement.
What is the difference between CAR-T and NK cell therapy?
CAR-T uses a patient's T cells genetically engineered to target a specific cancer marker, and is approved for some blood cancers. NK cell therapy uses natural killer cells, usually unmodified in private settings, and remains investigational.
What reports should I send for a review?
Your pathology report, latest scans (CT, MRI or PET), oncology letters, current treatment plan and recent blood tests. A doctor will review them and say honestly whether anything could reasonably be considered.
This page is general information, not medical advice, and does not replace a consultation with your own doctor. Results vary and no treatment outcome can be guaranteed. We are a patient coordination service and may receive a referral fee from partner medical providers. See our medical disclaimer and referral disclosure.