Immunotherapy

Immunotherapy for Cancer Treatment in India

Cancer immunotherapy is an advanced approach to cancer treatment that uses the body's immune system to identify, recognise and fight cancer cells. Unlike conventional treatments that directly target cancer cells, immunotherapy helps the immune system develop or strengthen its response against cancer. It has become an important treatment option for selected patients with cancers such as lung cancer, melanoma, kidney cancer, bladder cancer and certain blood cancers.

At Siris Healthcare, patients and families can explore immunotherapy treatment in India, understand available cancer treatment approaches and connect with relevant oncology specialists and hospitals. The suitability of immunotherapy depends on the cancer type, stage, molecular characteristics, previous treatments and the patient's overall health. A qualified medical oncologist can assess these factors and explain whether this treatment may be appropriate.

What Is Cancer Immunotherapy?

Cancer immunotherapy is a form of biological cancer treatment designed to help the immune system recognise and attack malignant cells. The immune system naturally protects the body against infections and abnormal cells. However, some cancer cells develop ways to avoid immune detection or suppress the body's natural immune response.

Immunotherapy medicines work by addressing some of these mechanisms. Depending on the treatment, they may activate immune cells, block signals that prevent immune cells from attacking cancer or help the immune system recognise specific targets on cancer cells.

Unlike chemotherapy, which directly affects rapidly dividing cells, immunotherapy for cancer works through specific immune mechanisms. It may be prescribed independently or combined with chemotherapy, radiation therapy, targeted therapy or surgery when clinically appropriate.

How Does Immunotherapy Work?

The immune system contains specialised cells, including T lymphocytes, that help identify and respond to abnormal cells. Some cancer cells can use immune checkpoint proteins to avoid being recognised and attacked.

Certain immunotherapy medicines block these inhibitory signals, allowing immune cells to respond more effectively against cancer. Other treatments introduce modified immune cells or use laboratory-produced antibodies to help target cancer cells.

The treatment approach depends on the medicine being considered and the biological characteristics of the tumour.

Understanding PD-1, PD-L1 and CTLA-4

PD-1, PD-L1 and CTLA-4 are proteins involved in regulating immune responses. Some cancer cells use these pathways to reduce immune activity around a tumour.

Immune checkpoint inhibitors block specific checkpoint signals and may help restore the immune system's ability to attack cancer cells. Doctors may recommend biomarker tests, including PD-L1 testing or other molecular investigations, to assess whether certain medicines are suitable.

These tests are not required for every immunotherapy treatment, and their importance varies according to the cancer type and treatment being considered.

Types of Immunotherapy Used in Cancer Treatment

Different forms of cancer immunotherapy work through different biological mechanisms. An oncologist selects the treatment according to the diagnosis, clinical evidence and individual patient factors.

1. Immune Checkpoint Inhibitors

Immune checkpoint inhibitors are medicines that block proteins such as PD-1, PD-L1 or CTLA-4. By preventing these proteins from suppressing immune activity, they can help T cells recognise and attack cancer cells.

They are used for selected cases of lung cancer, melanoma, kidney cancer, bladder cancer, head and neck cancer and other eligible malignancies.

2. Monoclonal Antibody Therapy

Monoclonal antibodies are laboratory-produced proteins designed to recognise particular targets on cancer cells or components of the immune system. Depending on their design, they may help immune cells identify cancer cells, interfere with tumour growth signals or deliver treatment to specific targets.

3. CAR T-Cell Therapy

Chimeric Antigen Receptor (CAR) T-cell therapy is a specialised form of immunotherapy in which a patient's T cells are collected and modified in a laboratory to recognise particular cancer-related targets. The modified cells are then returned to the patient's body.

This treatment is used for certain blood cancers and requires specialised facilities, careful patient selection and close monitoring.

4. Cancer Treatment Vaccines

Certain therapeutic cancer vaccines are designed to stimulate an immune response against specific cancer-related targets. They are different from preventive vaccines and are used only in particular clinical situations.

5. Immune System Modulators

Immune system modulators influence the activity of immune cells and the substances they produce. Certain cytokines and other immune-modulating medicines may be used for selected cancers under specialist supervision.

Which Cancers Can Be Treated With Immunotherapy?

Immunotherapy for cancer is an established treatment option for selected cancers, although its effectiveness and suitability vary considerably between cancer types and individual patients.

Depending on the approved indication, tumour characteristics and clinical circumstances, immunotherapy may be considered for:

• Lung cancer: Certain cases of non-small cell lung cancer and other eligible lung cancer types.
• Melanoma: Selected advanced or high-risk melanoma cases.
• Kidney cancer: Particular forms of renal cell carcinoma.
• Bladder cancer: Selected urothelial and bladder cancer conditions.
• Head and neck cancer: Certain recurrent or metastatic cancers.
• Colorectal cancer: Selected tumours with specific molecular characteristics, such as mismatch repair deficiency or microsatellite instability.
• Lymphoma: Certain types of Hodgkin and non-Hodgkin lymphoma.
• Liver cancer: Selected cases of hepatocellular carcinoma.
• Stomach cancer: Certain gastric and gastroesophageal cancers.
• Other solid tumours: Selected cancers with specific biomarkers or molecular features.

Not every patient with these cancers will qualify for immunotherapy. The decision requires a detailed review of pathology findings, imaging, biomarker results and previous treatment history.

Who May Be Eligible for Immunotherapy?

There is no single eligibility rule that applies to every patient. A medical oncologist evaluates several clinical factors before recommending immunotherapy treatment.

These may include:

• The specific cancer diagnosis and histological type.
• The stage and extent of cancer.
• PD-L1 expression or other relevant biomarkers, when required.
• Molecular findings such as MSI-H or dMMR status, where relevant.
• Previous chemotherapy, surgery, radiation therapy or targeted treatment.
• Overall health, organ function and existing medical conditions.
• Previous immune-related reactions or autoimmune disorders.

Patients with certain autoimmune conditions, organ transplants or other complex medical histories may need additional assessment before treatment. Eligibility should always be determined by the treating oncology team.

Immunotherapy Treatment Procedures and Administration

The method of administration depends on the specific medicine and treatment protocol. Many commonly used cancer immunotherapy medicines are administered through an intravenous infusion at a hospital or specialised oncology centre.

Depending on the treatment, other administration methods may include injections, oral medicines or specialised cell-based procedures.

What Happens During an Immunotherapy Session?

A typical treatment session may involve:

1. Medical assessment: The oncology team reviews symptoms, medical history and previous treatment response.
2. Pre-treatment investigations: Blood tests and other assessments may be performed to check whether treatment can proceed safely.
3. Medicine administration: The prescribed immunotherapy medicine is given according to the treatment schedule.
4. Observation: Healthcare professionals monitor the patient for infusion reactions or other immediate concerns.
5. Follow-up: Further appointments and investigations help assess treatment response and identify possible side effects.

Treatment intervals and duration vary according to the medicine, cancer type, treatment goals and the patient's response.

Benefits and Potential Role of Immunotherapy

For appropriately selected patients, immunotherapy can provide an additional treatment option when planning cancer care.

Potential benefits may include:

• Helping the immune system recognise and attack cancer cells.
• Providing a treatment option for certain cancers that respond to immune-based medicines.
• Offering an alternative or additional approach when conventional treatment alone may not be suitable.
• Being combined with chemotherapy, radiation therapy or other cancer treatments in selected cases.
• Producing durable responses in some patients.

However, immunotherapy does not work for everyone. Some patients may experience little benefit, while others may develop treatment resistance or disease progression. The expected benefits must be considered alongside potential risks.

Immunotherapy Side Effects and Possible Risks

Like other cancer treatments, immunotherapy can cause side effects. Some occur because immune activity becomes stronger and may affect healthy tissues as well as cancer cells.

The nature and severity of side effects depend on the medicine, dosage, treatment combination and individual health.

Commonly reported side effects include:

• Fatigue and weakness.
• Skin rash or itching.
• Fever and flu-like symptoms.
• Nausea or reduced appetite.
• Diarrhoea.
• Muscle and joint discomfort.
• Changes in thyroid or other hormone levels.

Immune-Related Adverse Effects

Some immunotherapy medicines can cause the immune system to attack healthy organs. This may lead to inflammation involving the lungs, liver, intestines, kidneys, heart, skin or hormone-producing glands.

Patients should promptly inform their oncology team about new or worsening symptoms, particularly persistent diarrhoea, severe abdominal pain, breathing difficulties, chest pain, unusual weakness, yellowing of the skin or eyes, or significant changes in urination.

Severe breathing problems, chest pain or other potentially serious symptoms require urgent medical attention. Side effects may sometimes appear even after treatment has ended.

Early recognition and appropriate medical management are important. Patients should not stop prescribed treatment or start medicines to manage suspected immune-related reactions without medical advice.

Immunotherapy vs Chemotherapy: Understanding the Difference

Both treatments are used in cancer care, but they work differently.

Chemotherapy uses medicines that directly damage or destroy cancer cells or interfere with their growth and division. It can also affect certain healthy cells, which contributes to familiar side effects such as hair loss, nausea and changes in blood counts.

Immunotherapy works by influencing the immune system so that it can recognise and respond to cancer cells more effectively. Its side effects may involve inflammation in different organs.

Neither treatment is universally better than the other. Some cancers respond well to chemotherapy, some to immunotherapy, and others may require a combination of approaches.

A specialist may also consider medical oncology and radiation oncology when developing an appropriate cancer treatment plan.

Diagnostic Tests Before Starting Immunotherapy

Before recommending treatment, the oncology team may review existing investigations or request additional tests to understand the cancer and assess treatment suitability.

Depending on the diagnosis, these may include:

• Biopsy and histopathology reports.
• Immunohistochemistry (IHC) testing.
• PD-L1 expression testing.
• Molecular profiling or genetic testing.
• MSI and mismatch repair (MMR) testing.
• CT, MRI or PET-CT imaging.
• Complete blood count and relevant blood chemistry tests.
• Kidney, liver and thyroid function assessments.

Not all patients require every investigation. The treating doctor decides which tests are relevant to the proposed treatment.

How to Prepare for Immunotherapy Treatment

Preparing for treatment starts with understanding the diagnosis, treatment goals and possible risks. Patients can make their consultation more productive by organising their medical information in advance.

Consider bringing:

• Recent biopsy and pathology reports.
• Relevant CT, MRI or PET-CT reports and images.
• Previous chemotherapy, radiation or surgical treatment records.
• Current medication and supplement details.
• Information about existing medical conditions, allergies or autoimmune disorders.
• Previous treatment-related side effects.

Discuss your regular medicines, pregnancy-related concerns where relevant, and any new symptoms with the oncology team before treatment.

Immunotherapy Monitoring, Recovery and Follow-Up

Immunotherapy does not follow the same recovery timeline for every patient. Some people continue their regular daily activities during treatment, while others may need additional rest or medical support.

Follow-up appointments help doctors assess how the cancer is responding, review blood test results, monitor organ function and identify possible immune-related side effects.

Imaging studies may be scheduled at appropriate intervals to evaluate treatment response. The oncology team may continue monitoring even after immunotherapy is completed because certain adverse effects can develop later.

Patients should follow their prescribed treatment schedule and maintain communication with their healthcare team throughout the treatment period.

How to Find Immunotherapy Hospitals and Cancer Specialists in India

Choosing an appropriate hospital for cancer treatment involves more than comparing treatment prices or facilities. Patients should consider the experience of the medical oncology team, access to relevant diagnostic testing, availability of the recommended medicines and the hospital's ability to monitor and manage treatment-related complications.

Siris Healthcare helps patients explore oncology specialists, compare available cancer hospitals in India and review relevant doctor profiles.

Patients can also explore the medical specialist directory and additional doctor profiles to identify healthcare professionals whose expertise is relevant to their diagnosis.

For patients who prefer an initial discussion before travelling, online doctor consultations may help them understand available options. International patients can also explore hospital and doctor information for medical travel.

A hospital's availability of a particular immunotherapy medicine, specialist or treatment programme should always be confirmed directly before making arrangements.

Frequently Asked Questions About Immunotherapy

Is immunotherapy a permanent cure for cancer?

Immunotherapy can produce long-lasting responses in some patients, but it is not a guaranteed cure. Outcomes depend on the cancer type, stage, treatment response and other clinical factors.

Is immunotherapy better than chemotherapy?

Neither treatment is universally better. The choice depends on the cancer diagnosis, tumour biology, previous treatments and the patient's health. In some cases, doctors recommend both treatments as part of a combined approach.

How long does immunotherapy treatment take?

Treatment duration varies according to the medicine and clinical protocol. Some patients receive treatment over several months, while others may follow a different schedule based on their response and treatment goals.

Is immunotherapy painful?

Most intravenous immunotherapy sessions involve inserting a cannula or accessing an existing venous line. Patients may experience temporary discomfort at the insertion site, but the infusion itself is generally not painful.

Does immunotherapy have serious side effects?

Yes. Although some patients experience mild symptoms, immunotherapy can occasionally cause serious immune-related inflammation affecting important organs. Prompt medical evaluation is essential when concerning symptoms occur.

Can immunotherapy be given with chemotherapy?

Yes. Certain cancer treatment protocols combine immunotherapy with chemotherapy, radiation therapy or other medicines. These combinations are selected according to clinical evidence and individual patient factors.

Does every cancer patient qualify for immunotherapy?

No. Eligibility depends on the cancer type, stage, relevant biomarkers, previous treatments and overall health. A medical oncologist must evaluate the patient before recommending this treatment.

What is the cost of immunotherapy treatment in India?

The cost varies significantly depending on the medicine, dosage, number of treatment cycles, diagnostic tests, hospital charges and additional medical requirements. Patients should request an individualised estimate from the hospital after clinical evaluation.

Consult an Oncology Specialist for Immunotherapy Guidance

A cancer diagnosis can raise difficult questions about treatment choices, expected outcomes and long-term care. Understanding the available options is an important step towards making informed healthcare decisions.

Through Siris Healthcare, patients and families can explore cancer hospitals, review oncology specialist profiles and enquire about immunotherapy treatment options in India. A qualified oncologist can review the medical reports, explain whether immune-based cancer treatment may be suitable and discuss the next steps.

Explore oncology care with Siris Healthcare and connect with a specialist to understand your cancer treatment options.

Medical Disclaimer: This information is intended for general educational purposes and does not replace professional medical advice, diagnosis or treatment. Immunotherapy eligibility, benefits, risks and outcomes vary between individuals. Treatment decisions should be made in consultation with a qualified medical oncologist.