When a child is diagnosed with cancer, parents face a barrage of treatment options, each with its own set of risks and benefits. Radiation treatment is sometimes a part of treatment, and you may wonder: Is it safe for a growing body? The answer is yes, it is safe in general, and it is often a key element of childhood cancer treatment, although it is not used as extensively in children as in adults. Read on to know what an oncologist has to say to parents when it comes to radiation therapy in children.
Is Radiation Therapy Safe for Kids With Cancer?
Dr Ankur Nandan Varshney, Senior Consultant, Medical Oncology, Haematology and Bone Marrow Transplant at Medanta Hospital, Noida, confirms that radiation therapy is generally considered safe for children with cancer and is also an essential component of their treatment. He says doctors consider the effectiveness of treatment for the cancer, while balancing the risk to a child's still-growing body, and only use it when necessary.
According to a 2021 study published in Frontiers in Oncology, radiation therapy remains a critical, highly effective tool for treating pediatric cancers. Modern technologies such as proton therapy and intensity-modulated radiotherapy (IMRT) enable radiation to be directed with a very high degree of precision today.
This decreases radiation exposure to healthy tissues and will minimise long-term side effects. Further, in this era, doctors can now use the most precise radiation to combine it with targeted medicines to develop safer, personalised treatment plans that protect growing children while effectively combating cancer.
How Is Radiation Therapy Different for Children Than Adults?
According to Dr Varshney, there are quite a few key differences:
- Dosing – doses are calculated more conservatively, since children's tissues are more sensitive to radiation
- Technique – modern techniques like proton therapy are increasingly preferred in children where available, since they target the tumour more precisely and spare surrounding healthy tissue better than standard radiotherapy
- Sedation – younger children often need sedation or anaesthesia during sessions to stay still, which isn't usually required for adults
- Growth consideration – treatment planning has to account for the fact that the child's body is still growing, which adults' bodies aren't
According to a 2024 review published in the International Journal of Research and Innovation in Social Science, children are much more sensitive to radiation than adults. Kids have rapidly dividing cells and much longer lifespans ahead, so they face much higher cancer risks from exposure. A 10-year-old's lifetime cancer risk from radiation is roughly five times higher than a 70-year-old's. Children's bodies and organs are smaller and still developing, making traditional radiation techniques affect them differently. This is why doctors use special planning and lower doses for kids.
What Are the Short-Term Side Effects?
Dr Varshney notes that short-term side effects are similar in nature to adult side effects but often felt more acutely given a child's smaller body size:
- Fatigue
- Skin irritation at the treatment site
- Nausea, particularly with abdominal radiotherapy
- Loss of appetite
- Site-specific effects, such as a sore throat with head or neck radiotherapy
Most of these side effects are manageable and tend to improve after treatment ends, though they can be uncomfortable whilst treatment is ongoing.
Are There Long-Term Effects to Watch For?
This is where radiation therapy in children differs most significantly from adults, according to Dr Varshney. Long-term effects can include:
- Growth effects – radiotherapy near growth plates or the spine can affect bone growth and final height
- Hormonal issues – brain or neck radiotherapy can affect the pituitary or thyroid gland, leading to hormonal imbalances later
- Cognitive effects – brain radiotherapy in young children can affect learning and memory as they grow
- Fertility – pelvic or abdominal radiotherapy can affect future fertility
- Second cancers – a small increased risk of a different cancer developing later in life
Dr Varshney emphasises an important point: these effects don't always show up right away. Some emerge years or even decades after treatment, which is why lifelong follow-up matters so much.
How Are These Long-Term Effects Managed?
According to Dr Varshney, management involves a comprehensive, ongoing approach:
- Long-term follow-up with a paediatric oncology survivorship team, tracking growth, hormones, and organ function over time
- Regular growth and development monitoring through childhood and adolescence
- Hormone level checks, with replacement therapy if needed
- Fertility preservation discussions before treatment starts, where relevant
- Academic and cognitive support if learning difficulties emerge
- Routine cancer screening as an adult, given the slightly elevated long-term risk
Dr Varshney also notes that whilst there is a small but real increase in the lifetime risk of developing a second cancer after radiation therapy, this risk is outweighed by the benefits of treating the original cancer.
ALSO READ- How Is Childhood Cancer Chemotherapy Different From Adult Chemotherapy? Oncologist Explains
Conclusion
Dr Varshney assures that most children tolerate radiation therapy quite well with today's advances in radiation techniques and careful planning of treatment. Curing cancer is not the only aim. Quality of life is preserved, and side effects of treatment in the long term are minimised.
Radiation therapy is an important part of the treatment for childhood cancer when it is used appropriately to balance the risks and benefits of treating the cancer. All of the aspects of treatment, from dosage to technique to long-term follow-up, are designed with a child's growth in mind. When families are knowledgeable about both their immediate needs and the long monitoring that is required, they can be more effective in collaborating with their medical provider to achieve the best possible outcome.
FAQ
1. Can proton therapy completely eliminate the risk of long-term side effects from radiation?
Proton therapy will cause less exposure to healthy tissue in the area around the tumour, and this will reduce the chance of some long-term side effects occurring compared to conventional radiotherapy. But it does not mean that the risk is totally removed. Some radiation can still reach nearby structures2. How often does a child need follow-up appointments after finishing radiation therapy?
The frequency of follow-up depends on the type of cancer treated, the radiation received and many other factors, but most children will require follow-up examinations for many years, usually at least once a year. Some may need more frequent visits at first or further special appointments if any long-term effects do occur, like hormonal or growth problems.
All possible measures have been taken to ensure accuracy, reliability, timeliness and authenticity of the information; however Onlymyhealth.com does not take any liability for the same. Using any information provided by the website is solely at the viewers’ discretion. In case of any medical exigencies/ persistent health issues, we advise you to seek a qualified medical practitioner before putting to use any advice/tips given by our team or any third party in form of answers/comments on the above mentioned website.
How we keep this article up to date:
We work with experts and keep a close eye on the latest in health and wellness. Whenever there is a new research or helpful information, we update our articles with accurate and useful advice.
-
Current Version
Jul 23, 2026 18:42 IST
Published By : Vivek Kumar
Reviewed By : Dr Ankur Nandan Varshney
