A cancer diagnosis is not the end of the story. It is the beginning of a treatment journey that should be based on the type of cancer, stage, tumour biology, overall health, treatment goals and individual circumstances.

Modern cancer treatment rarely follows a single approach. Depending on the disease, treatment may involve surgery, radiation therapy, chemotherapy, immunotherapy, targeted therapy, hormone therapy, or a combination of several modalities.

The aim is not simply to treat the tumour. Good cancer care also considers the person’s symptoms, quality of life, treatment-related side effects, emotional wellbeing and long-term health.

Understanding Cancer Treatment

Cancer treatment refers to the medical approaches used to control, remove, destroy or manage cancer.

The treatment recommended for one patient may be very different from that recommended for another patient, even when they have the same broad cancer type.

This is because treatment decisions can depend on:

Type of cancer
Location of the primary tumour
Stage of disease
Tumour size and extent
Lymph-node involvement
Presence or absence of distant metastasis
Histological characteristics
Molecular and genetic characteristics
Biomarker results
Previous treatments
Age and general health
Other medical conditions
Treatment tolerance
Patient preferences
Overall goals of treatment

This is why there is no single “best cancer treatment” that applies to everyone.

What Are the Goals of Cancer Treatment?

Cancer treatment can have different objectives.

Curative Treatment

When cancer is potentially curable, treatment is planned with the goal of eliminating the disease and achieving long-term cancer control.

Curative treatment may involve one treatment modality or a combination.

For example, a patient may receive:

Surgery + chemotherapy + radiation therapy

Radiation therapy + chemotherapy

depending on the cancer and its stage.

Disease Control

For some cancers, particularly advanced cancers, treatment may focus on controlling the disease for as long as possible.

The goals may include:

Slowing tumour growth
Preventing further progression
Reducing tumour burden
Maintaining function
Preserving quality of life
Prolonging survival

Advances in systemic therapies have allowed many patients with advanced cancer to live for extended periods while receiving ongoing treatment.

Symptom Relief and Palliative Treatment

Cancer treatment is not always intended to eliminate the disease.

Radiation therapy, medicines and other supportive interventions may be used to relieve symptoms such as:

Cancer-related pain
Bleeding
Difficulty swallowing
Pressure caused by a tumour
Symptoms from bone metastases
Neurological symptoms
Other complications caused by cancer

This is called palliative treatment.

Palliative treatment does not mean that doctors have stopped caring for the patient. It is an important part of comprehensive cancer care and focuses on comfort, function and quality of life.

Multidisciplinary Cancer Treatment

Cancer treatment is increasingly multidisciplinary.

Depending on the patient’s condition, the treatment team may include:

Surgical oncologist
Medical oncologist
Radiation oncologist
Radiologist
Pathologist
Nuclear medicine specialist
Palliative-care specialist
Specialist nurses
Dietitian
Physiotherapist
Rehabilitation professionals
Psychosocial support professionals

Complex cases may be discussed during a multidisciplinary tumour board.

The specialists review the available clinical information, imaging and pathology to determine the most appropriate treatment strategy.

This approach is particularly important when several treatment options are available or when treatment needs to be carefully sequenced.

Surgery

Surgery is an important treatment modality for many solid tumours.

The objective may be to:

Remove the primary tumour
Remove involved lymph nodes
Obtain tissue for diagnosis
Reduce tumour burden
Relieve obstruction or other complications
Treat certain localized cancers

Depending on the cancer, surgery may be performed before or after other treatments.

Surgery as Part of Combined Treatment

Cancer treatment is often not limited to surgery alone.

For some cancers, treatment may involve therapy before surgery, known as neoadjuvant treatment.

The purpose may include:

Shrinking the tumour
Treating microscopic disease early
Improving the possibility of complete surgical removal
Assessing how the tumour responds to treatment

Treatment given after surgery is generally referred to as adjuvant treatment.

Adjuvant treatment may be used to reduce the risk of recurrence by treating cancer cells that may remain after the visible tumour has been removed.

The exact role of neoadjuvant and adjuvant treatment depends on the cancer type and stage.

Radiation Therapy

Radiation therapy uses high-energy radiation to damage the DNA of cancer cells, preventing them from continuing to grow and divide.

Radiation can be delivered externally using a radiation treatment machine or internally using a technique such as brachytherapy.

Radiation therapy may be used:

As the primary treatment
Before surgery
After surgery
Together with chemotherapy or other systemic treatments
To control locally advanced disease
To treat selected metastatic sites
To relieve cancer-related symptoms

Modern radiation oncology aims to deliver the prescribed dose accurately to the target while limiting unnecessary radiation exposure to surrounding healthy tissues.

Modern Radiation Techniques

Advances in radiation technology have significantly improved the ability to plan and deliver treatment.

Depending on the clinical situation, techniques may include:

3D Conformal Radiation Therapy (3DCRT)

Uses three-dimensional imaging to design radiation fields according to the shape and location of the tumour.

Intensity-Modulated Radiation Therapy (IMRT)

Uses multiple radiation beams with varying intensities to create a more precise dose distribution.

Image-Guided Radiation Therapy (IGRT)

Uses imaging during treatment to verify patient positioning and improve treatment accuracy.

Volumetric Modulated Arc Therapy (VMAT)

Delivers radiation while the treatment machine rotates around the patient, allowing the radiation dose to be shaped according to the treatment plan.

Stereotactic Body Radiation Therapy (SBRT)

Uses highly precise radiation delivery to administer a high dose to selected tumours in a limited number of treatment sessions.

Stereotactic Radiosurgery (SRS)

Despite the name, SRS is a radiation treatment rather than conventional surgery. It delivers highly focused radiation to selected intracranial or other appropriate lesions.

Brachytherapy

Places a radiation source close to or directly within the treatment area, allowing radiation to be delivered locally.

The appropriate technique is selected according to the tumour, its location, its relationship with nearby organs and the overall treatment objective.

Chemotherapy

Chemotherapy uses medicines that can destroy cancer cells or prevent them from multiplying.

It can be used:

Before surgery
After surgery
Together with radiation therapy
For metastatic disease
To reduce tumour burden
To control symptoms associated with cancer

Chemotherapy can affect rapidly dividing normal cells as well as cancer cells. This is why some patients experience side effects such as:

Fatigue
Nausea
Vomiting
Changes in blood counts
Hair loss
Mouth sores
Increased susceptibility to infection

Not every patient experiences the same side effects.

Modern supportive medicines can help manage many treatment-related symptoms.

Immunotherapy

The immune system naturally helps protect the body against abnormal cells.

Immunotherapy uses medicines that help the immune system recognize or attack cancer more effectively.

It has become an important treatment option for selected cancers.

However, immunotherapy is not appropriate for every patient or every cancer.

Its use may depend on:

Cancer type
Stage
Biomarker results
Previous treatment
Overall health
Specific treatment indications

Immunotherapy can also produce side effects related to increased immune activity, so patients receiving these medicines require appropriate monitoring.

Targeted Therapy

Targeted therapies are designed to act on specific molecular characteristics involved in cancer growth or survival.

Unlike conventional chemotherapy, which can affect many rapidly dividing cells, targeted treatments are developed to act on particular molecular pathways or alterations.

Before using certain targeted therapies, doctors may need to perform molecular or biomarker testing on the tumour.

Depending on the cancer, these tests may identify a molecular alteration that can be treated with a particular medicine.

Targeted therapy is therefore an important example of the movement toward personalized cancer treatment.

Hormone Therapy

Some cancers depend on hormones for growth.

This is particularly relevant to certain:

Breast cancers
Prostate cancers

Hormone therapy works by reducing hormone production or blocking the effect of hormones on cancer cells.

It may be used alone or alongside other treatments such as surgery, radiation therapy or systemic therapy.

The decision depends on the biological characteristics of the tumour.

Combination Treatment

Many cancers are best treated using a combination of modalities.

For example, treatment may involve:

Surgery → chemotherapy → radiation therapy

or:

Chemotherapy + radiation therapy → surgery

or:

Systemic therapy → surgery → additional treatment

The sequence is not arbitrary.

Doctors consider the biology and stage of the cancer, the purpose of each treatment and the expected benefit when determining the order.

This is known as multimodality treatment.

Why Treatment Sequencing Matters

The order in which treatments are given can influence their effectiveness and safety.

For example, radiation therapy may be recommended before surgery in certain cancers to reduce the risk of local recurrence or improve surgical outcomes.

In another situation, surgery may be performed first, followed by radiation or systemic therapy.

The appropriate sequence is therefore determined by the cancer-specific evidence and the patient’s individual clinical circumstances.

Treatment Planning Is Individualized

Cancer treatment should not be based solely on the cancer’s name.

Two people with the same cancer type may have different:

Tumour sizes
Stages
Biomarker profiles
Medical conditions
Treatment histories
Treatment goals

As a result, their treatment plans may also be different.

This is the foundation of personalized oncology.

How Is the Treatment Plan Decided?

Before recommending treatment, the oncology team may review:

1. Diagnosis

What type of cancer is present?

2. Stage

How extensive is the disease?

3. Tumour biology

What molecular or pathological characteristics does the cancer have?

4. Patient factors

What is the patient’s overall health and ability to tolerate treatment?

5. Treatment evidence

Which treatments have demonstrated benefit for this particular disease?

6. Patient preferences

What matters most to the patient in terms of treatment goals, side effects and quality of life?

These factors are considered together.

What Happens Before Radiation Therapy?

When radiation therapy is recommended, treatment does not normally begin immediately after the first consultation.

A planning process is required.

This may involve:

Reviewing pathology and imaging.
Determining whether radiation is appropriate.
Performing a treatment-planning CT scan.
Establishing the patient’s treatment position.
Delineating the tumour or treatment target.
Identifying nearby organs at risk.
Designing the radiation plan.
Reviewing dose distribution.
Performing appropriate quality assurance.
Starting treatment once the plan is approved.

The exact process varies according to the treatment technique and cancer type.

Protecting Healthy Tissues

A central principle of modern radiation oncology is balancing tumour control with protection of normal tissues.

Radiation treatment planning may involve identifying organs located near the tumour that are sensitive to radiation.

These are often referred to as organs at risk (OARs).

The treatment plan is designed to provide the required radiation dose to the target while reducing unnecessary dose to surrounding structures as much as reasonably achievable.

Modern techniques such as IMRT, VMAT and IGRT can help achieve highly conformal treatment plans in appropriate clinical situations.

Managing Treatment Side Effects

Cancer treatment can produce side effects.

The type and severity depend on:

Treatment modality
Treatment site
Dose
Treatment duration
Individual sensitivity
Combination with other therapies

Side effects may be:

Temporary
Persistent
Immediate
Delayed

Patients should report new or worsening symptoms to their treatment team.

Supportive medicines, nutritional support, rehabilitation and other interventions can help manage many treatment-related problems.

Cancer Treatment and Quality of Life

Successful cancer treatment is not only about tumour control.

Quality of life is an important consideration throughout the treatment journey.

Depending on the patient’s circumstances, the oncology team may address:

Pain
Nutrition
Sleep
Fatigue
Mobility
Emotional wellbeing
Treatment-related symptoms
Sexual health
Work and daily activities
Long-term side effects

This is particularly important for patients receiving treatment over an extended period.

Palliative Care Is Part of Cancer Care

Palliative care focuses on improving comfort and quality of life for people affected by serious illness.

It can help manage:

Pain
Breathlessness
Nausea
Appetite problems
Fatigue
Emotional distress
Other symptoms

Importantly, palliative care is not limited to the final stages of life.

It may be introduced alongside active cancer treatment when patients have significant symptoms or supportive-care needs.

For some patients, palliative radiation therapy can provide effective relief from symptoms caused by localized tumour deposits or metastases.

Cancer Treatment Does Not End With the Last Treatment Session

Completing surgery, radiation therapy or chemotherapy is an important milestone, but cancer care continues beyond active treatment.

Follow-up may include:

Clinical examinations
Imaging
Laboratory investigations where appropriate
Monitoring for recurrence
Management of late treatment effects
Rehabilitation
Nutritional support
Psychological support
Survivorship care

The exact follow-up schedule depends on the cancer type, stage and treatment received.

Cancer Recurrence

Cancer can sometimes return after treatment.

This is known as recurrence.

Recurrence may occur:

At or near the original tumour site
In nearby lymph nodes
At a distant site

The possibility of recurrence depends on many factors, including the cancer type, stage, biology and response to treatment.

If recurrence occurs, treatment options depend on where the cancer has returned, previous treatment and the patient’s overall condition.

Recurrence does not necessarily mean that treatment options have ended.

Living After Cancer Treatment

For patients who complete treatment and remain free of active disease, survivorship becomes an important part of care.

Survivorship may include:

Regular follow-up
Monitoring for recurrence
Managing late effects
Returning to normal activities
Physical rehabilitation
Healthy lifestyle measures
Emotional support
Addressing work and social concerns

The transition from active treatment to survivorship should be individualized.

The Importance of Communication

Cancer treatment can be complicated.

Patients may hear many unfamiliar terms, receive multiple reports and meet several specialists.

It is perfectly reasonable to ask your doctors to explain:

What the treatment is intended to achieve
Why it has been recommended
How long it may take
What side effects are possible
How side effects will be managed
What alternatives exist
What follow-up will be required

Understanding the purpose of treatment can help patients participate more confidently in decisions about their care.

Questions to Ask Before Starting Treatment

Before beginning treatment, consider asking:

What type and stage of cancer do I have?
What is the goal of my treatment?
What treatment options are available?
Why are you recommending this particular approach?
Will I need more than one type of treatment?
What is the expected treatment schedule?
What side effects should I expect?
Which side effects require urgent medical attention?
How will my response to treatment be assessed?
What happens after treatment is completed?

Taking a family member or trusted person to important consultations can also be helpful.

A Message From Dr. Geeta Singh

Cancer treatment is not a one-size-fits-all process. Every treatment decision should begin with understanding the cancer—its type, stage, biology and relationship with surrounding structures—and then considering the person who is being treated.

Modern oncology gives us multiple tools: surgery, radiation therapy, chemotherapy, immunotherapy, targeted treatments, hormonal therapy and supportive care. The challenge is not simply having these options, but choosing the right combination and sequence for the individual patient.

My approach as a radiation oncologist is to focus on evidence-based treatment, precision in radiation delivery, careful attention to surrounding healthy tissues and clear communication with patients throughout their treatment journey.