If you or someone in your family has just been told “we’d like to try immunotherapy for cancer,” you’ve probably already gone home and typed half a dozen questions into Google at midnight. Is this the same as chemo? Will it work for this specific cancer? What does a cycle actually look like?
This guide answers all of that in plain language. It covers how does immunotherapy work, which cancers and patients tend to respond to it, how it’s different from chemotherapy and targeted therapy, what a typical treatment schedule looks like, and where to go for cancer immunotherapy in Mumbai. If you’re weighing this decision for yourself or a parent or spouse, we hope this gives you a clearer starting point before your next appointment.
What Immunotherapy Actually Does
Your immune system is already built to find and destroy abnormal cells. It does this every day, mostly without you noticing. Cancer cells survive by learning to hide from it, often by producing a protein called PD-L1 that essentially tells nearby immune cells “nothing to see here, move along.”
Immunotherapy doesn’t attack the tumour directly the way chemotherapy does. Instead, it removes that disguise. Checkpoint inhibitor drugs, the most commonly used form of immune system cancer treatment, block the PD-L1 signal (or the matching receptor, PD-1, on immune cells) so the immune system can recognise the cancer cells as a threat again and go after them on its own.
This is also why immunotherapy behaves so differently from patient to patient. In some people, the immune system responds strongly and tumours shrink over a few months. In others, the response is partial or slow. A smaller group doesn’t respond at all. This isn’t a matter of trying harder or “fighting” the disease better, it comes down to the biology of that specific tumour, which is exactly why testing before treatment matters so much.
The Different Types of Immunotherapy
Not every patient gets the same drug or the same mechanism. The main categories used in cancer care today are:
- Checkpoint inhibitors (pembrolizumab, nivolumab, atezolizumab, and similar drugs): block the proteins cancer cells use to hide from the immune system. This is the type most patients in Mumbai are prescribed.
- Monoclonal antibodies: lab-made proteins that latch onto specific markers on cancer cells, either flagging them for destruction or blocking signals the tumour needs to grow.
- CAR T-cell therapy: a patient’s own T-cells are extracted, genetically modified to recognise cancer cells, and infused back. Mostly used for certain blood cancers like leukaemia and lymphoma, and considerably more specialised than checkpoint inhibitors.
- Cancer vaccines: still limited in use in India, generally offered at select centres as part of research protocols.
For most solid tumours, checkpoint inhibitors are what your oncologist is likely discussing with you.
Immunotherapy Eligibility: Who Actually Qualifies
This is where a lot of the online information gets oversimplified. Immunotherapy eligibility isn’t just about cancer stage. Your oncologist is usually looking at three things together:
1. Cancer type. Some cancers respond consistently well to immunotherapy, including immunotherapy for lung cancer, melanoma, kidney cancer, bladder cancer, certain head and neck cancers, Hodgkin lymphoma, and a subset of immunotherapy for breast cancer in triple-negative cases. Others respond less predictably, and for some cancers, immunotherapy isn’t currently a standard option at all.
2. Biomarker results. Before recommending immunotherapy, your doctor will typically order tests on your tumour tissue or blood, checking PD-L1 expression, microsatellite instability (MSI-H), and tumour mutation burden (TMB). In lung cancer specifically, high PD-L1 expression can sometimes mean immunotherapy is used as a first-line treatment on its own, without chemotherapy first. Lower PD-L1 levels usually mean immunotherapy gets combined with chemotherapy instead. Two patients with the exact same cancer and stage can have completely different treatment plans once their biomarker results come back.
3. Overall health and stage. Immunotherapy is used across a wider range of stages than people assume, including before surgery to shrink a tumour or after surgery to reduce recurrence risk in some cancers. But your general fitness, organ function, and any pre-existing autoimmune conditions all factor into whether your oncologist recommends it. Patients with active autoimmune disease need a more cautious conversation, since immunotherapy works by ramping up immune activity.
The honest answer is there’s no checklist you can run through at home. This is a conversation for your oncologist, ideally with your biomarker report in hand.
Immunotherapy vs Chemotherapy vs Targeted Therapy
Patients often ask why their doctor isn’t just picking “the strongest one.” Here’s the actual difference between immunotherapy vs chemotherapy and targeted therapy vs immunotherapy:
Chemotherapy kills rapidly dividing cells throughout the body. It doesn’t distinguish well between cancer cells and healthy fast-growing cells like hair follicles or gut lining, which is why hair loss and nausea are common side effects. It works across a broad range of cancers and is often still the backbone of treatment.
Targeted therapy goes after a specific genetic mutation or protein driving that particular tumour’s growth. It requires molecular testing to confirm the mutation is present, and it only works if that mutation is actually there.
Immunotherapy doesn’t touch the tumour directly. It retrains your own immune system to do the work. Immunotherapy side effects tend to look different from chemo, less hair loss and nausea, more fatigue, skin rashes, or occasional inflammation in organs like the lungs or thyroid.
In practice, these three aren’t always competing options. Many patients receive some combination, immunotherapy alongside chemotherapy, or targeted therapy followed by immunotherapy if the cancer progresses. Your treatment plan depends on your specific diagnosis, not a one-size-fits-all hierarchy.
Immunotherapy Treatment Process: What to Expect
Here’s roughly what the immunotherapy treatment process looks like if your oncologist recommends it:
Before starting: Blood work, imaging (CT or PET scan), and biomarker testing on tumour tissue. This step alone can take one to two weeks depending on how quickly the lab processes the sample.
During treatment: Immunotherapy is usually given as an IV infusion in an outpatient daycare setting, similar to chemotherapy daycare. A session typically takes 30 minutes to a couple of hours depending on the drug. Most protocols run every two to four weeks.
Immunotherapy sessions required: This varies a great deal by cancer type and how the patient responds. Some patients continue for a fixed number of cycles, others continue as long as scans show benefit and side effects stay manageable, sometimes stretching to a year or longer.
Monitoring: Scans every few cycles track whether the tumour is shrinking, stable, or growing. Blood tests check organ function, since immunotherapy can occasionally trigger inflammation in the liver, lungs, thyroid, or gut.
One thing worth knowing going in: immunotherapy can take longer to show visible results on a scan than chemotherapy does. Tumours sometimes appear to grow slightly before they shrink, a pattern called pseudoprogression, because immune cells are moving into the tumour. Your oncologist will usually explain this ahead of time so a scan doesn’t cause unnecessary panic.
Immunotherapy Side Effects, and When They’re Serious
Most patients tolerate immunotherapy reasonably well, and is immunotherapy safe is one of the first questions people ask. Side effects are often milder than chemotherapy. Common ones include fatigue, skin rash or itching, mild fever, joint pain, and diarrhoea.
Less commonly, the immune system attacks healthy tissue instead of just cancer cells, causing inflammation in the lungs (pneumonitis), liver, gut, or thyroid. These need prompt attention rather than “waiting it out.” If you’re on immunotherapy and notice persistent cough or breathlessness, yellowing skin, severe diarrhoea, or unusual fatigue that doesn’t fit your normal pattern, call your oncology team the same day rather than at your next scheduled visit.
What Determines Immunotherapy Cost
We’re intentionally not listing figures here, because cost varies too much patient to patient to be useful as a blanket number, and outdated numbers online tend to cause more anxiety than clarity. What we can tell you is what actually drives immunotherapy cost in India:
- Which drug is used. Some checkpoint inhibitors cost more than others.
- Whether it’s combined with chemotherapy. Combination protocols cost more per cycle than immunotherapy alone.
- Number of cycles. More advanced or slower-responding cancers may need more cycles, which affects total cost.
- Hospital setup. Daycare outpatient centres generally work out less expensive than inpatient admission for the same drug, since you’re not paying for a hospital bed.
On immunotherapy insurance coverage India: many health insurance policies now cover immunotherapy, though coverage limits and pre-authorisation requirements vary by insurer and policy. It’s worth having this conversation with your insurer early, before treatment starts, rather than after the first cycle. Our team at Oorja can walk you through your specific treatment plan and what it involves, and help you understand what documentation your policy typically needs.
Immunotherapy at Oorja Oncology Centre, Chembur
Oorja Oncology Centre is run by Dr. Suhas Agre, Medical Oncologist, and Dr. Madhura Ambekar Agre, Hemato-Oncologist, both based full-time in Chembur, making them a trusted choice for cancer immunotherapy in Chembur and across the eastern suburbs. Immunotherapy here is delivered in the same outpatient daycare model as our chemotherapy service, meaning you come in for your infusion and go home the same day, without the disruption of an inpatient admission.
What that looks like in practice: your biomarker testing and consultation happen with the same oncologist who will manage your ongoing cycles, not a rotating team. Infusions are given in a dedicated, supervised space with oncology nurses monitoring you throughout. Blood work before each cycle checks that your organs are tolerating treatment well, and any side effects get addressed early rather than at your next scheduled visit weeks later.
If you’ve been searching for the best oncologist in Chembur or simply typed oncologist near me after a recent diagnosis, and you’re based in Chembur, Kurla, Govandi, or Navi Mumbai, we can pick up your treatment plan with your existing records, drug administration sheets, and recent scans if you’re already midway through treatment elsewhere.
Frequently Asked Questions
Is immunotherapy safe? For most patients, yes, when given under proper medical supervision with regular blood work and monitoring. Serious immune-related side effects are uncommon but need quick attention when they happen, which is why follow-up between cycles matters as much as the infusion itself.
What is the immunotherapy success rate? This depends heavily on cancer type and biomarker profile, and there’s no single number that applies to everyone. Response rates for well-matched patients, strong PD-L1 expression, for example, tend to be considerably higher than for patients without those markers. Your oncologist can give you a realistic expectation based on your specific biomarker results, not a generic statistic.
How many immunotherapy sessions will I need? Most protocols run every two to four weeks, and the total number of cycles depends on cancer type and how your body responds. Some patients complete a fixed course, others continue treatment for as long as scans show benefit.
Does immunotherapy work for lung cancer and breast cancer? Immunotherapy is well established for non-small cell lung cancer, particularly with high PD-L1 expression. For breast cancer, it’s used mainly in triple-negative breast cancer, usually combined with chemotherapy. Not every subtype of either cancer qualifies, which is exactly why biomarker testing comes before the treatment decision.
Is immunotherapy covered by insurance in India? Many policies now cover it, but coverage details, sub-limits, and pre-authorisation steps differ by insurer. Check with your policy provider before starting treatment, and ask your oncology centre for help with the documentation.