In pediatric oncology, nutrition is often reduced to a simple question: Is the child eating enough? In practice, it is rarely that straightforward. During intensive cancer treatment, appetite, swallowing, taste, gastrointestinal tolerance, body weight, body composition, and functional capacity can change within days. A nutrition plan that works well in one phase of treatment may become difficult, or even impossible, a few weeks later.
This is the journey of a twelve-year-old girl with Ewing sarcoma who has been through a prolonged and intensive course of treatment, and how her nutrition care had to evolve alongside her changing clinical condition. Patient details have been de-identified and the patient’s name has been changed to protect confidentiality.
Starting from a place of significant nutritional vulnerability
She underwent surgery involving the L3/L4 region in December 2024, followed by chemotherapy and radiotherapy through 2025. Chemotherapy was completed in January 2026. In March 2026, she developed dysphagia and slurring of speech, and subsequent evaluation showed active disease. She continued to receive intensive oncological treatment, including further chemotherapy and radiotherapy.
Real physician voices, twice a week
Free, and one click to unsubscribe.
By the time she entered our nutrition program, she had already lost a significant amount of weight, from approximately 45 kg to 31 kg, and was markedly weak. She was receiving RT feeding while transitioning toward oral intake.
Her initial laboratory profile reflected the nutritional and clinical challenges she was facing. Hemoglobin was 9.5 g/dL, albumin 2.9 g/dL, total protein 6.2 g/dL, and potassium 3.2 mmol/L. Creatinine was 0.34 mg/dL, sodium 136 mmol/L, WBC 11,800/µL, and platelet count 181 ×10³/µL. These values were considered together with her weight history, oral intake, treatment-related symptoms, and functional status rather than being looked at in isolation.
One of the immediate priorities was to improve her oral intake enough to move away from RT feeding. Within approximately a week, her intake had improved sufficiently for RT feeding to be removed. It was an important early milestone, but getting back to oral intake did not mean that the nutritional challenges were over. In fact, much of the nutritional work was only beginning.
Nutrition had to change as treatment changed
Over the following months, her tolerance varied considerably. There were periods of diarrhea and constipation, altered taste, nausea, bloating, oral mucositis, difficulty chewing, pain, and profound fatigue. At one point, even drinking water was uncomfortable because of oral soreness. Protein intake was another challenge, particularly because of a significant aversion to protein supplements.
This meant that nutrition could not follow a fixed meal plan. Recommendations had to be adjusted according to what she was experiencing at that particular point in treatment. When chewing became difficult, textures were modified. When oral soreness made certain foods or flavors difficult to tolerate, those choices were changed. When protein supplements were not acceptable, other food-based sources were explored. On days when overall intake was poor, increasing the energy density of the foods she could tolerate became more important than trying to increase meal volume.
The objective was not to create a theoretically perfect diet on paper. It was to make sure that the nutrition being recommended was realistic enough for her to actually consume.
Holding on while treatment continued
After the initial decline from approximately 45 kg to 31 kg, her weight remained around 29 kg for nearly two months, despite ongoing treatment and recurrent gastrointestinal and oral complications. In a child who had already experienced such significant weight loss, maintaining weight was encouraging. However, it could not be considered nutritional recovery on its own.
Later clinical observations indicated significant loss of body fat and cachexia, reinforcing why weight alone could not be used to understand her nutritional status. Her oral intake, symptoms, body composition, and functional capacity all needed to be considered alongside the weighing scale.
At the same time, there were changes that were encouraging from a functional perspective. She had progressed from RT feeding to oral eating and was able to take regular meals. Her family began noticing days when her energy was remarkably good. She started meeting friends and was able to travel for several hours. Most importantly, she started studying again.
She is now preparing for her quarterly examinations and has requested permission from her principal to appear for the examinations from home or the hospital so that her treatment does not completely interrupt her education. For a child who had previously been profoundly weak, being able to return to studying and maintain some connection with school is a meaningful part of her progress.
Then came another difficult phase
Her course, however, was far from linear. Following radiotherapy, she developed significant oral mucositis. At its worst, even water caused discomfort, and opening her mouth and eating became difficult. Chemotherapy brought further gastrointestinal complications, including severe diarrhea, with a period of approximately fifteen bowel movements in a day, followed later by constipation. There were also episodes of abdominal cramping, fatigue, and markedly reduced intake.
Her blood counts changed during treatment as well. By September, hemoglobin was 8.0 g/dL, hematocrit 25.6 percent, and platelet count 140 ×10³/µL. There had also been a period when chemotherapy could not be administered as planned because of low platelet counts.
For nutrition, this meant reassessing the situation repeatedly. The question was not simply what foods were nutritionally ideal, but what she could tolerate at that point in treatment, what symptoms were limiting her intake, and which nutritional priorities were realistically achievable.
There were days when protein intake needed more attention. On other days, hydration and gastrointestinal tolerance were the immediate concern. During severe oral discomfort, managing the ability to eat itself became the first priority. When meal volumes were very small, energy density became particularly important. And sometimes, the most appropriate approach was simply to preserve whatever intake she was able to tolerate and prevent further deterioration.
Looking beyond calories, protein, and weight
One of the most important lessons from this journey has been that nutritional care in oncology cannot always be reduced to calories, protein, and weight. A child may technically be meeting a nutritional target but still be struggling significantly with oral tolerance, fatigue, or functional capacity. Similarly, weight stabilization can be encouraging in a severely depleted patient, but it does not necessarily mean that nutritional reserves have been restored.
In her case, her ability to eat orally, her gastrointestinal tolerance, her energy levels, and her participation in everyday activities became important parts of the overall picture. Being able to sit with friends, travel for a few hours, or open a book and prepare for examinations may not appear on a conventional nutrition assessment, but they tell us something about how the child is functioning through an extremely demanding period of treatment. These milestones do not replace clinical or nutritional assessment, but they add important context to it.
What this journey has taught us
This case has reinforced for us that nutrition intervention has to begin with what is possible for the child at that moment. A recommendation has little value if the child cannot tolerate or consume it.
It has also highlighted the importance of keeping nutrition plans flexible. In pediatric oncology, symptoms can change quickly, and the plan sometimes needs to change with them. Food preferences and aversions matter too. If a child strongly rejects a supplement, repeatedly pushing the same product may not be the most useful approach. Finding an acceptable alternative can sometimes make a greater practical difference.
And perhaps most importantly, function deserves attention. Eating orally again, having enough energy to meet friends, being able to travel, and returning to studies are all meaningful aspects of a child’s life during treatment.
Her treatment journey is still ongoing, and so is her nutritional care. There are difficult days, and there are days when her energy is remarkably good. There are still nutritional challenges to work through, but there is also studying, meeting friends, and looking ahead to her examinations.
For us, this is what individualized medical nutrition therapy looks like in practice. It is not always about producing a perfect meal chart. Sometimes it is about preventing further weight loss. Sometimes it is about helping a child transition from RT feeding back to oral intake. Sometimes it means finding foods that can be tolerated through severe mucositis, or adapting intake around diarrhea, constipation, and treatment-related fatigue. And sometimes, it is about helping preserve enough nutritional and functional capacity for a child to continue doing the things that matter to her.
Nutrition does not replace cancer treatment. But thoughtful, individualized nutrition care can be an important part of helping a child navigate that treatment.
In pediatric oncology, progress is not always reflected in a single number. It can also look like sitting down for a meal, having enough energy to see a friend, traveling for a few hours, or opening a book and preparing for an examination.
For a child going through prolonged cancer treatment, those moments matter.
Manjari Chandra is a nutritional medicine physician in India.
