Introduction
germ cell tumors
ADULT BRAIN TUMOR, GERM CELL TUMORS, BRAIN TUMORS, PEDIATRIC MEDULLOBLASTOMA, PEDIATRIC CANCER
Craniospinal irradiation (CSI) is the standard treatment for brain tumors prone to leptomeningeal dissemination, such as pediatric medulloblastoma and some germ cell tumors [Techniques for the delivery of PBT have advanced in recent decades. One of the most representative advances is the development of the spot scanning technique using pencil beams [Our facility has been established in Dec 2017 adjacent to one of the largest pediatric cancer regional core hospitals in our country. The number of treated pediatric patients using PBT has been the highest since 2018 in our country. We compared robustness of planning target volume (PTV) dose based on irradiation technique of PBT in pediatric and young adult brain tumor patients who received CSI in our facility.