Brachytherapy in India
Brachytherapy puts the radiation source inside the body, right beside or within the tumour, instead of aiming beams in from outside. Because radiation dose falls away very sharply with distance, this delivers an intense dose to the target while nearby organs receive remarkably little. For cervical cancer it is not optional; it is essential to cure.
- What it is
- Radiation delivered from inside the body, beside or within the tumour
- Also called
- Internal radiotherapy, sealed source radiotherapy, seed implant
- Two forms
- HDR, high dose rate over minutes; LDR, low dose rate from permanent seeds
- Most important in
- Cervical cancer, where outcomes depend on it. Also prostate
- Anaesthetic
- Usually spinal or general for insertion, depending on the site
- Cost
- Depends on the site and number of insertions. Estimate before you travel
Why being close changes everything
Radiation intensity falls off with the square of the distance from its source. Double the distance and the dose drops to a quarter. That simple physical fact is what brachytherapy exploits.
An external beam has to travel through healthy tissue to reach a tumour, so that tissue receives dose on the way in. A source placed inside the tumour has no journey to make. Tissue a centimetre or two away receives a small fraction of what the tumour receives, and the falloff is far steeper than any external technique can achieve, including IMRT or proton therapy.
The trade-off is equally clear: the source has to be physically placed, which means a procedure, and it only works where the tumour can be reached. Brachytherapy is therefore not a general alternative to external radiotherapy. It is a specialist tool that is decisive in particular situations.
Cervical cancer: where it is essential
This deserves emphasis, because it is the single most important thing on this page. For locally advanced cervical cancer, treatment consists of external radiotherapy with chemotherapy followed by brachytherapy. The brachytherapy component is not an optional extra or a booster. Omitting it is associated with substantially worse survival.
The reason is anatomical. To cure cervical cancer, the dose needed at the centre of the tumour is higher than external beams can safely deliver, because the bladder and rectum sit immediately adjacent. Placing the source inside the cervix delivers that dose where it is needed while sparing both.
If you have locally advanced cervical cancer and a treatment plan is proposed that does not include brachytherapy, ask why directly. Not every centre has the equipment and expertise, and it is a legitimate reason to seek treatment somewhere that does. India's established cancer centres perform it routinely.
Prostate cancer: seeds and temporary implants
For prostate cancer, brachytherapy takes two forms. Permanent seed implantation places dozens of tiny radioactive seeds, about the size of a grain of rice, throughout the prostate in a single procedure. They deliver their dose gradually over months and then become inert, and they stay in place permanently.
Temporary high-dose-rate brachytherapy instead places hollow needles, passes a source through them for a few minutes, and removes everything afterwards. It is sometimes used alone and sometimes as a boost alongside external radiotherapy for higher-risk disease.
Both are alternatives to surgery or to CyberKnife for suitable patients, with their own pattern of urinary and sexual side effects. See prostate cancer treatment for how the options compare.
HDR and LDR, and what the procedure feels like
HDR, high dose rate. Applicators or needles are placed under anaesthetic, imaging confirms their position, a plan is calculated, and a single strong source travels through them under computer control for a few minutes. Everything is then removed. You are not radioactive afterwards and pose no risk to family. Several sessions are usually given.
LDR, low dose rate. Permanent seeds emitting weakly over months. Radiation does not travel far beyond the prostate, but you will be given sensible precautions for the first weeks, typically about close contact with young children and pregnant women.
Being honest about comfort: the insertion is a procedure, done under spinal or general anaesthetic, and for gynaecological brachytherapy the applicator has to stay in place while imaging and planning are completed. Most patients describe it as uncomfortable rather than painful, and pain relief is part of the process. Ask what anaesthetic will be used and how long the applicator stays in.
How long you will stay, and what it costs
Brachytherapy is usually one part of a longer plan rather than the whole of it. For cervical cancer, the external radiotherapy and chemotherapy phase runs around five weeks, with brachytherapy insertions towards the end, so budget for the full course. Prostate seed implantation, by contrast, can be a single short admission.
India is considerably less expensive than Western countries, and brachytherapy is widely available here rather than confined to a few centres. You receive a written estimate covering the insertions, imaging, planning and follow-up before you commit, with no fee to us built in; the hospital pays us, so your bill is never marked up.
Questions patients ask
Will I be radioactive afterwards?
With HDR brachytherapy, no. The source is removed at the end of each session and nothing radioactive remains in you. With permanent seed implants for prostate cancer, the seeds emit weakly for some months, and you will be given simple precautions for the first weeks, usually about prolonged close contact with young children and pregnant women. Normal daily life continues.
Is brachytherapy painful?
The radiation itself cannot be felt. Placing the applicator or needles is a procedure done under spinal or general anaesthetic. Afterwards there can be discomfort, and for gynaecological brachytherapy the applicator remaining in place during planning is the part most patients find hardest. Pain relief is part of the process, and you should ask specifically what will be given.
Why is brachytherapy so important for cervical cancer?
Because curing locally advanced cervical cancer needs a higher dose at the tumour than external beams can safely deliver, given how close the bladder and rectum are. Placing the source inside the cervix achieves that dose while sparing both. Treatment plans that omit brachytherapy are associated with worse survival, so it is worth asking about explicitly.
Is it better than external radiotherapy?
Neither is better in general; they do different jobs and are frequently combined. External radiotherapy covers a wider area including lymph nodes. Brachytherapy delivers a very high dose to a small, reachable target with exceptional sparing of nearby organs. For cervical cancer the combination is standard because each does something the other cannot.
How many sessions will I need?
It depends on the site and the form used. Gynaecological HDR brachytherapy typically involves several insertions over a couple of weeks. Prostate seed implantation is a single procedure. Your radiation oncologist will set out the schedule, and for planning travel it is worth asking early.
Is it available in India?
Yes, and widely. Brachytherapy including image-guided gynaecological brachytherapy and prostate implants is performed routinely in India's accredited cancer centres. Our partner network includes hospitals with this capability, and we will name the hospital and consultant before you commit to anything.