ESTRO 2025 - Abstract Book

S1653

Clinical – äediatric tumours

ESTRO 2025

Conclusion: In conclusion, our results demonstrate that the inclusion of PT in the multimodality management of Ewing Sarcoma not only provides effective local tumor control but also minimizes the incidence of long-term functional toxicities thereby indicating a favorable safety profile.

Keywords: Particle therapy/Pediatric RT/Soft tissue sarcoma

4292

Digital Poster Protontherapy in medulloblastoma: Spanish experience with a compact system

Mireia Valero, Marta Montero, Ana de Pablo, Claudia M Diaz, Ignacio Azinovic, Morena Sallabanda, Fernando Cerrón, Juan Maria Perez, Juan Antonio Vera, Juan Castro, Alejandro Mazal, Elisabet Canals, Isabel Lorenzo, Rebeca Marquez, Jose Torresano, Andrea Morales, Stephanie Bolle Radiation Oncology, Quironsalud Proton Center, Madrid, Spain Purpose/Objective: Medulloblastoma is the most common malignant brain tumour in children. With surgery, craniospinal irradiation (CSI) is the cornerstone of treatment. Due to high rate of side effects related to conventional radiation therapy, use of protontherapy in medulloblastoma is increasing in aim to improve tolerance and reduce sequelae.