Cancer
Radiation Oncology
Radiation Oncology uses radiation therapy to treat cancer and destroy cancer cells.
Introduction
If you or someone you love has just been told radiation therapy is part of the treatment plan, it’s natural to have questions, and a little apprehension too. Radiation oncology is one of the three pillars of modern cancer care, alongside surgical oncology and medical oncology. Roughly half of all cancer patients need it at some point, either on its own or combined with the other two.
At its core, the idea is straightforward: high-energy beams are aimed at the tumour to damage the DNA of cancer cells so they can no longer divide, while the surrounding healthy tissue is spared as much as possible. What has changed dramatically over the last two decades is the precision with which this is done. Modern planning software, real-time imaging and beam-shaping technology let our radiation oncology team sculpt the dose to within a few millimetres of the target, sparing organs that sit right next to the tumour in a way that simply wasn’t possible a generation ago.
Causes
- Genetic changes that affect normal cell growth
- Smoking and tobacco use
- Unhealthy diet and lifestyle factors
Who Typically Needs Radiation Therapy
- Cancers that need local control after surgery, to reduce the chance of the tumour returning in the same area
- Localised tumours that can't be operated on, whether due to location, size or a patient's overall fitness for surgery
- Bone, brain or organ metastases that are causing pain or other symptoms
- A small number of non-cancerous (benign) conditions where radiation is the most effective option
Symptoms That May Prompt a Radiation Consultation
- Bone pain from metastatic disease, which radiation often relieves quickly and dramatically
- Bleeding or blockages caused by a tumour pressing on a nearby structure, both of which palliative radiation can control effectively
- Ongoing or recurring cancer in an area that was previously treated with surgery
When to Consult a Doctor
Ideally, a radiation oncologist should be part of the conversation from the very beginning of your cancer treatment planning, not brought in only once surgery or chemotherapy is already underway. Even when radiation isn’t the first or primary treatment, an early opinion helps map out whether it will be needed later and how it fits into the overall sequence of care. This kind of upfront planning, coordinated across specialities, tends to lead to smoother treatment overall and fewer surprises along the way.
Diagnosis and Treatment Planning
- A thorough review of all existing imaging and pathology reports
- A planning CT scan done in the exact position you'll be treated in, using immobilisation devices to keep that position consistent
- MRI or PET-CT fusion imaging to map the target area with as much accuracy as possible
- 4D-CT scanning for tumours that move with breathing, such as those in the lung
- An independent quality assurance check of the treatment plan before it's ever used on a patient
- Daily image guidance immediately before each treatment session, to confirm positioning down to the millimetre
Treatment Options
IMRT / VMAT
Intensity-modulated and volumetric-modulated arc therapy shape and vary the intensity of radiation beams so the dose conforms tightly to the tumour’s exact shape, reducing exposure to nearby healthy tissue.
Image-Guided Radiation Therapy (IGRT)
Daily imaging on the treatment couch confirms that the patient is positioned identically each day, which matters enormously when doses are this precise.
Stereotactic Body Radiation Therapy (SBRT)
Very high, tightly focused doses delivered over just 3 to 5 sessions, typically used for small tumours in the lung, liver, spine or pancreas.
Stereotactic Radiosurgery (SRS)
A single, highly precise treatment session for brain tumours and brain metastases. Despite the name, no actual surgical incision is involved.
Brachytherapy
Radioactive sources are placed directly inside or next to the tumour, delivering a concentrated dose from within. It’s commonly used for cervical, prostate, breast and head-and-neck cancers.
Palliative Radiation
Short, focused courses aimed at relieving pain, bleeding or obstruction in patients with advanced cancer, prioritising comfort and quality of life.
What to Expect During Treatment
Treatment starts with a planning visit: a CT scan taken in the exact position you’ll be treated in, sometimes with a custom mould or mask to keep you still. Over the following days, the radiation oncologist and medical physicist build your treatment plan and run it through several layers of quality checks before your first session.
From there, treatments are usually delivered daily, Monday through Friday, with each visit lasting 15 to 30 minutes. Most of that time goes into positioning and image verification rather than the radiation itself, which is painless and takes only a few minutes to deliver. SBRT and brachytherapy work a little differently, involving fewer sessions that each run somewhat longer. Throughout the course, you’ll have a weekly review with your care team to check how you’re tolerating treatment and adjust supportive care as needed.
Benefits of Treatment
- Curing localised cancers without surgery in select cases, including early-stage larynx, prostate, cervical and anal cancers
- Lowering the risk of local recurrence when used after surgery
- Preserving organ function, such as saving the voice box in laryngeal cancer or avoiding mastectomy through breast-conserving approaches
- Providing fast, often dramatic relief from bone pain caused by metastatic disease
- Offering single-session or short-course options for certain tumours, reducing the overall treatment burden
- Being delivered entirely as an outpatient, with no hospital admission required in most cases
Recovery and Aftercare
Most people are able to continue their normal day-to-day activities throughout radiation therapy. Side effects tend to build up gradually over the course of treatment and depend heavily on which part of the body is being treated: skin changes, mucositis, fatigue, or urinary and bowel changes are among the more common ones. Our team supports you through this with practical skincare guidance, nutritional advice and other supportive measures that make a genuine difference to comfort levels.
Once treatment ends, most side effects settle over the following weeks. Follow-up imaging is used to assess how the tumour has responded, and a structured surveillance schedule continues for years afterward to catch any recurrence early.
Possible Risks and Complications
What to be aware of
- Redness or irritation of the skin in the treated area
- Fatigue, which is usually mild to moderate and improves after treatment ends
- Site-specific mucosal effects, for example in the mouth or throat for head-and-neck treatment
- Hair loss limited to the area actually being treated, not all over the body
- Longer-term effects such as tissue fibrosis or a change in how a nearby organ functions
- A very small risk of a second, unrelated cancer developing in the treated area many years down the line
Prevention Tips
- General cancer prevention measures still apply during and after radiation: avoiding tobacco, limiting alcohol, maintaining a healthy weight, staying current on screening, and getting relevant vaccinations
- Radiation itself, used appropriately and under expert supervision, is a tool for controlling cancer rather than something to fear or avoid
Why Choose Medaura
Medaura connects patients with surgeons and physicians trained at India’s leading medical institutions, clinicians who continue to publish research, teach and push their fields forward, not just practise within them. Every treatment recommendation we make is grounded in current international guidelines combined with our doctors’ direct, hands-on clinical experience.
Beyond the clinical side, we coordinate appointments, second opinions, diagnostic workups, transparent cost estimates and travel logistics for patients coming to us from across India and abroad. Our goal is that you spend your energy focusing on getting better, not on navigating a fragmented healthcare system alone.
Radiation oncologists
Sub-specialty trained in IMRT, VMAT, SBRT
Transparent pricing
Written estimates, no hidden charges.
Tumour-board planning
Every case reviewed by a full team
Book this treatment
Request a Consultation
A coordinator responds within one business day with next steps, costs and timeline.
Related Treatments
Curative cancer surgery — minimally invasive, robotic and complex resections.
Personalised chemotherapy, targeted therapy and immunotherapy.
Frequently Asked Questions
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Is radiation painful?
No. The treatment itself doesn’t hurt. Side effects are related to the specific area being treated and usually start showing up in the second or third week of a course.
Will I be radioactive after treatment?
External-beam radiation, the most common form of treatment, does not leave you radioactive. Brachytherapy involving permanent implants does come with temporary contact precautions, which your care team will explain clearly beforehand.
Can I keep working during radiation therapy?
Most patients do continue working, though many find it helpful to adjust their hours or workload during the later weeks of treatment as fatigue can build up.
How many sessions of radiation therapy will I need?
It depends on the type of cancer and the treatment goal. Standard courses often run 15 to 35 sessions over several weeks, while SBRT and SRS can be completed in as few as 1 to 5 sessions.
Does radiation therapy hurt during the actual session?
No. You won’t feel anything while the machine delivers the dose. It’s similar to having an X-ray taken, just for a longer duration.
Can I eat normally during treatment?
In most cases, yes. If the treatment area includes the mouth, throat or abdomen, our team will guide you on any temporary dietary adjustments to keep you comfortable and well nourished.
Is radiation therapy safe for elderly patients?
Yes. Age alone doesn’t rule out radiation therapy. Our team assesses overall health and fitness for treatment individually, and many older adults tolerate it very well.
