Any serious illness in the pediatric setting requires nurses highly trained in that speciality. Children are not little adults, medications need to be dosed differently, pain needs to be managed differently, vial signs are in totally different ranges and their ability to care for themselves may be non-existent. Additionally there is a lot of family support and education involved in pediatric specialties and the nurses need to know how to deliver that. Any patient young or old will have a more successful return to health with nurses trained in their specific condition.
Infants, toddlers, children, and teens are not miniature adults. That is why we have separated out pediatrics as a specialty in medicine. Children have unique physical and needs during their treatment for cancer
For more info: https://www.quora.com/Why-is-pediatric-oncology-nursing-important