Cancer treatment has evolved tremendously over the last decade.
Today, one of the most exciting breakthroughs in oncology is Cancer Immunotherapy—a treatment that helps the body’s own immune system recognize and destroy cancer cells.
According to Dr. Deenadayalan T, immunotherapy has transformed cancer care and is offering new hope to patients with advanced cancers who previously had limited treatment options.
Let’s understand how this revolutionary treatment works.
🧬 What Is Cancer Immunotherapy?
Cancer immunotherapy is a treatment that uses specialized medications to activate the body’s immune system against cancer.
Normally, our immune system constantly patrols the body and destroys abnormal cells before they become dangerous.
However, cancer cells are highly intelligent.
👉 They develop ways to hide from the immune system and avoid being attacked.
Immunotherapy helps remove these protective shields, allowing the immune system to recognize and destroy cancer cells.
🔍 Why Doesn’t the Immune System Destroy Cancer Naturally?
Under normal circumstances, immune cells called T-cells identify and eliminate abnormal cells.
However, cancer cells often produce a protein called:
👉 PD-L1 (Programmed Death-Ligand 1)
This protein interacts with:
👉 PD-1 receptors found on immune T-cells.
When PD-L1 binds to PD-1:
❌ The immune cell gets switched off.
❌ The cancer escapes detection.
❌ The tumor continues growing.
This is one of the most important mechanisms cancer uses to survive.
🚀 The Breakthrough: Checkpoint Inhibitors
The major breakthrough in cancer immunotherapy came around 2011 with the development of:
👉 Checkpoint Inhibitors
This revolutionary discovery changed cancer treatment worldwide and led to a Nobel Prize for the pioneering scientists involved.
Checkpoint inhibitors work by:
✔️ Blocking the PD-1/PD-L1 interaction
✔️ Reactivating immune cells
✔️ Allowing T-cells to attack cancer again
Today, when doctors discuss cancer immunotherapy, they are usually referring to checkpoint inhibitors.
💉 How Is Immunotherapy Given?
Immunotherapy is typically administered as:
👉 Intravenous (IV) injections
Treatment schedules vary depending on the medication.
Most commonly:
- Every 2 weeks
- Every 3 weeks
The treatment is usually given in a day-care setting without requiring prolonged hospitalization.
✅ Advantages of Immunotherapy
One reason immunotherapy has become so popular is its favorable side-effect profile.
Compared with traditional chemotherapy, immunotherapy often offers:
✔️ Fewer side effects
✔️ Better quality of life
✔️ Improved long-term disease control
✔️ Better tolerance in older patients
Because of these advantages, many patients above 70 years of age who may not tolerate chemotherapy can still receive immunotherapy safely.
⚠️ Does Immunotherapy Have Side Effects?
Although generally well tolerated, immunotherapy can cause unique side effects called:
👉 Immune-Related Adverse Events (irAEs)
These occur when the activated immune system mistakenly attacks healthy tissues.
Possible complications include:
🩺 Colitis
Inflammation of the intestines.
🫁 Pneumonitis
Inflammation of the lungs.
🦋 Thyroiditis
Inflammation affecting thyroid function.
🧠 Hypophysitis
Inflammation of the pituitary gland.
The good news is:
👉 Most of these complications can be effectively managed when identified early.
Steroid treatment is often highly effective in controlling these immune-related reactions.
🎯 Which Cancers Benefit from Immunotherapy?
Immunotherapy is now routinely used for several cancers, including:
- Lung Cancer
- Kidney Cancer
- Melanoma
- Head and Neck Cancers
- Bladder Cancer
- Certain Gastrointestinal Cancers
In many situations, immunotherapy is used after chemotherapy has failed.
However, for some cancers, it is increasingly becoming a first-line treatment option.
🌟 How Immunotherapy Is Changing Survival Outcomes
One of the most remarkable achievements of immunotherapy is its impact on advanced cancers.
Patients with Stage 4 cancer who previously had very limited survival may now experience:
✔️ Long-term disease control
✔️ Improved quality of life
✔️ Survival extending for many years
For some patients, the results have been truly life-changing.
📰 What About the Dostarlimab Cancer Cure Story?
You may have heard news reports about:
👉 Dostarlimab
A small clinical trial reported complete tumor disappearance in a group of rectal cancer patients without surgery.
The results were extraordinary and generated worldwide attention.
However:
⚠️ The study involved a relatively small number of patients.
Before becoming standard treatment, larger studies and long-term follow-up are necessary.
Nonetheless, the findings demonstrate the incredible potential of immunotherapy.
💰 Is Immunotherapy Expensive?
At present, immunotherapy remains relatively costly.
The main reasons include:
- Patent protection
- Advanced manufacturing processes
- Limited competition
However, this situation is expected to improve.
As patents expire and biosimilar versions become available:
👉 Costs are likely to decrease significantly.
🇮🇳 Immunotherapy in India: Making Treatment More Affordable
Several cancer centers in India are exploring innovative approaches to reduce treatment costs.
One promising strategy is:
👉 Low-dose immunotherapy
Some studies have shown encouraging outcomes using significantly lower doses while maintaining effectiveness.
If validated further, this approach could make immunotherapy accessible to many more patients.
🏥 Can Advanced Immunotherapy Be Accessed in Madurai?
A common misconception is that advanced cancer treatments are only available in metro cities.
The reality is changing rapidly.
Today, patients in tier-two cities such as Madurai can access:
- Immunotherapy
- Targeted therapy
- Precision oncology
- Advanced diagnostic testing
without necessarily traveling long distances for treatment.
🔮 The Future of Cancer Treatment
Cancer immunotherapy is still evolving.
Researchers worldwide are developing:
- New checkpoint inhibitors
- Combination immunotherapies
- Personalized immune-based treatments
The future of oncology is moving steadily toward more precise and less toxic treatments.
Many experts believe immunotherapy will play a central role in making cancer increasingly manageable—and potentially curable—for more patients.
👨⚕️ Cancer Care in Madurai
Dr. Deenadayalan T is a leading Medical Oncologist in Madurai specializing in:
- Immunotherapy
- Targeted Therapy
- Chemotherapy
- Precision Oncology
- Personalized Cancer Care
Patients receive evidence-based treatment tailored to their individual cancer type and condition.
✅ Final Takeaway
Cancer cells survive by hiding from the immune system.
Immunotherapy helps remove that disguise.
By reactivating the body’s natural defenses, immunotherapy has transformed cancer treatment and opened new possibilities for patients across the world.
While it may not be suitable for every cancer or every patient, it remains one of the most exciting advancements in modern oncology.