During the practical year of her medical studies, Sarah discovered her interest in pediatric oncology. She started working on the current research project during the last year of her Master studies. Meanwhile, Sarah finished Medical school and is working as a resident in the surgical department while advancing the research project. Her research interest lies in the long-term outcome of children treated for brain tumors at a very young age. We aim to identify factors that influence the long-term survival and health-related outcomes of those patients.