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Radiotherapy in Hodgkin lymphoma, the modern way | CION Cancer Clinics
Radiotherapy is still used for Hodgkin lymphoma, but much less and far more precisely than in the past. Today it is usually a short course aimed only at the glands that were affected, given after chemotherapy. Many people with a clear PET-CT scan now need none. This page explains when it is offered, how a course runs, and the long-term trade-offs worth discussing with your team. At CION Cancer Clinics, our haematology team plans myeloma and lymphoma care with you, discussed at a tumour board and explained in plain words.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- Is radiotherapy still used for Hodgkin lymphoma?
- In which situations is radiotherapy offered today?
- How is modern radiotherapy different from the old approach?
- What happens during a course of radiotherapy?
- Should you have radiotherapy or leave it out?
- What side effects are common during the course?
- What do families still believe about radiation?
- Common questions about radiotherapy for Hodgkin lymphoma
The short answer
Is radiotherapy still used for Hodgkin lymphoma?
Yes, but far less, and in a much more targeted way than a generation ago. Today it is mostly a short course aimed only at the glands that were affected, given after chemotherapy, and many people with Hodgkin lymphoma now need no radiotherapy at all.
Why it changed
Decades ago, large areas of the chest, neck and armpits were treated with high doses. That controlled the lymphoma well, but years later some survivors developed heart disease, thyroid problems, lung scarring and second cancers, especially breast cancer in women treated young. Modern treatment keeps the benefit while shrinking the area and lowering the strength.
What "involved-site" means
Involved-site radiotherapy, written ISRT on plans, treats only the area where lymphoma was found at diagnosis, with a small safety margin. The healthy organs around it, such as the heart, breasts and lungs, are deliberately kept out of the beam as far as possible.
Where scans come in
PET-CT scans before, during and after chemotherapy now decide whether radiotherapy is needed. A clear scan often means it can be left out. An area that stays active at the end may be treated on its own.
This page cannot tell you whether you need radiotherapy. That depends on your stage, scans and age, and is decided with your haematologist and a radiation oncologist.When it is used
In which situations is radiotherapy offered today?
Radiotherapy is usually one part of a plan, not the whole of it. These are the common reasons it is suggested.
Early stage, after short chemotherapy
A few cycles of chemotherapy followed by a short course of radiotherapy to the affected glands is a standard plan for early-stage disease.
Leaving it out may be discussed when
- The interim PET is clear
- The patient is a young woman with chest disease
A large mass or a leftover active area
In advanced disease, radiotherapy is usually kept for a bulky mass, or for an area still active on the end-of-treatment PET-CT.
Usually not needed when
- The end scan is fully clear
- There was no large mass at diagnosis
Nodular lymphocyte-predominant type
This rarer, slower type sometimes appears in a single gland area. Radiotherapy alone can be enough for that early, limited disease.
Some people with this type are simply watched at first, with no treatment until it is needed.Relapse or before a transplant
It can treat an area that has come back, or be used around a stem cell transplant arranged with a qualified transplant centre.
It is also used to ease pain or pressure from a mass.Not sure whether this applies to you?
Ask an oncologistThen and now
How is modern radiotherapy different from the old approach?
Older approach
Today
Large fields covering many gland areas
Only the sites that were involved
Often the main treatment on its own
Usually a short course after chemotherapy
Higher total strength of radiation
Lower strength for most people
Planned on plain X-rays
Planned on CT and PET-CT in three dimensions
Heart and breasts often in the beam
Shaped beams and breath-hold to spare them
The course
What happens during a course of radiotherapy?
-
Meeting the radiation oncologist
They review your scans from before chemotherapy, explain which area will be treated and why, and go through the side effects that apply to that area.
-
The planning scan
A CT scan in the exact position you will be treated in. For the neck, a shaped mesh mask may be made. For the chest, you may practise holding a deep breath, which moves the heart away from the beam.
-
Planning time
The team shapes the beams on a computer to cover the target and avoid healthy organs. This usually takes several days.
-
Daily treatment
Sessions on weekdays, over a few weeks. Each takes minutes, you feel nothing, and you go home straight afterwards.
-
After the last session
Side effects peak around the end and settle over the following weeks. Long-term follow-up then looks out for late effects.
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Weighing it up
Should you have radiotherapy or leave it out?
For some people with early-stage disease this is a genuine choice. Adding radiotherapy lowers the chance of the lymphoma coming back. Leaving it out avoids its long-term risks but means a slightly higher chance of needing more treatment later.
Who the long-term risks matter most for
Young women having radiotherapy to the chest carry the most important extra risk, because breast tissue is sensitive at that age. People with existing heart disease or diabetes, and anyone who smokes, also need their heart and lungs weighed carefully.
Who may benefit most from keeping it
Older adults, people with bulky disease, and those whose scans have not fully cleared often gain more from radiotherapy than they risk. For them, avoiding a relapse and a second, harder round of treatment can matter more.
Questions to ask
Ask which organs will receive some radiation, whether breath-hold or shaped beams will be used, and what the plan would be if you chose to leave radiotherapy out. A good team will explain both paths without pressure.
Your case may be discussed at a tumour board, where haematologists and radiation oncologists look at your scans together. Ask what they concluded and why.During treatment
What side effects are common during the course?
- Tiredness that builds towards the end of the course
- Redness or darkening of the skin in the treated area
- A sore throat or pain on swallowing when the neck or chest is treated
- Dry mouth or a changed sense of taste with neck treatment
- Hair loss only in the treated area, such as the back of the neck
- Feeling sick when the abdomen is treated
Commonly believed
What do families still believe about radiation?
"Radiation will burn the whole body."
Modern radiotherapy affects only the area in the beam. Side effects appear in that area, such as the skin or throat, not everywhere. Tiredness is the one general effect.
"After radiotherapy you are radioactive and should
stay away from children."
External beam radiotherapy leaves nothing behind in the body. You can hug your children and grandchildren the same evening.
"My uncle had heart trouble after radiation, so it
will happen to me."
Many of those problems came from the much larger, stronger fields used decades ago. Today's plans aim to keep the heart dose low, though a small risk remains and follow-up checks it.
"If radiotherapy is not in the plan, the doctors
have given up on it."
Leaving it out is often a deliberate choice after a clear scan, made to spare you long-term effects. It is a sign the chemotherapy worked well.
Questions we are asked
Common questions about radiotherapy for Hodgkin lymphoma
How many sessions of radiotherapy will I need?
Courses for Hodgkin lymphoma are usually short, given on weekdays over a few weeks. The exact number depends on your stage, the plan and how the chemotherapy went. Your radiation oncologist will give you the full schedule at the planning visit, so you can arrange travel and work around it.
Can I travel from my district every day?
Many people do, but daily travel adds to tiredness towards the end. Some families arrange to stay with relatives in Hyderabad for the course. Ask whether session times can be fixed to fit a bus or train timing, as that often helps.
Will it affect my fertility?
Radiotherapy to the neck or chest does not usually affect fertility. Treatment near the pelvis can, and the ovaries or testes may be shielded or moved out of the way. Ask about fertility before planning, because options must be arranged before treatment starts.
Is breath-hold radiotherapy available for chest treatment?
Deep inspiration breath-hold is used at many radiotherapy centres for chest treatment. Holding a big breath pushes the heart away from the target. Ask the radiation oncologist whether it suits your case and whether the centre offers it, as your team can coordinate access if needed.
What follow-up do I need years later?
After radiotherapy to the neck, thyroid blood tests are usually checked regularly. After chest treatment, heart checks and, for women treated young, earlier breast screening may be advised. Keep your treatment summary safe and share it with every new doctor.
Can I refuse radiotherapy?
Yes, it is your decision. Before deciding, ask your team what the plan would be without it, how it changes the chance of relapse for you, and what follow-up you would need. Make the decision with full information rather than fear.
Should I use cream on my skin during treatment?
Use only what the radiotherapy team recommends. Many creams, oils and turmeric pastes can irritate treated skin or affect the treatment. Wash gently with plain water, wear soft cotton clothes and keep the area out of direct sun.
Is radiotherapy covered by Aarogyasri or insurance?
Radiotherapy that is part of an approved treatment plan is often covered by Aarogyasri, CGHS, ECHS, EHS, PM-JAY and cashless insurance. Scheme rules and approvals change, so check your current entitlement with the helpline before the planning scan.
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Sources
- Cancer Research UK — Hodgkin lymphoma
- American Cancer Society — Treating Hodgkin lymphoma
- National Cancer Institute — Adult Hodgkin Lymphoma Treatment (PDQ) - Patient Version
- Macmillan Cancer Support — Hodgkin lymphoma
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Heart and Thyroid Follow-Up After Chest RadiationThe checks that matter years afterwardsEarly-Stage Favourable vs Unfavourable HodgkinThe groups where radiotherapy is most debatedInterim PET and Response-Adapted TreatmentHow a clear scan can let radiotherapy be left outRadiation therapy guideHow radiotherapy works across cancers
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