ESTRO meets Asia 2024 - Abstract Book

S225

Interdisciplinary – Mixed sites/palliation

ESTRO meets Asia 2024

2. Moeller B, Balagamwala EH, Chen A, Creach KM, Giaccone G, Koshy M, et al. Palliative thoracic radiation therapy for non-small cell lung cancer: 2018 Update of an American Society for Radiation Oncology (ASTRO) Evidence Based Guideline. Pract Radiat Oncol. 2018;8(4):245-50. 3. van der Velden J, Willmann J, Spałek M, Oldenburger E, Brown S, Kazmierska J, et al. ESTRO ACROP guidelines for external beam radiotherapy of patients with uncomplicated bone metastases. Radiother Oncol. 2022;173:197 206.

4. Chow E, Zeng L, Salvo N, Dennis K, Tsao M, Lutz S. Update on the systematic review of palliative radiotherapy trials for bone metastases. Clin Oncol (R Coll Radiol). 2012;24(2):112-24.

5. Majumder D, Chatterjee D, Bandyopadhyay A, Mallick SK, Sarkar SK, Majumdar A. Single Fraction versus Multiple Fraction Radiotherapy for Palliation of Painful Vertebral Bone Metastases: A Prospective Study. Indian J Palliat Care. 2012;18(3):202-6. 6. Gutiérrez Bayard L, Salas Buzón Mdel C, Angulo Paín E, de Ingunza Barón L. Radiation therapy for the management of painful bone metastases: Results from a randomized trial. Rep Pract Oncol Radiother. 2014;19(6):405-11.

7. Howard, R., Kanetsky, P.A. & Egan, K.M. Exploring the prognostic value of the neutrophil-to-lymphocyte ratio in cancer. Sci Rep 9, 19673 (2019). https://doi.org/10.1038/s41598-019-56218-z

8. Allende-Pérez S, Rodríguez-Mayoral O, Peña-Nieves A, et alPerformance status and survival in cancer patients undergoing palliative care: retrospective studyBMJ Supportive & Palliative Care Published Online First: 10 August 2022. doi: 10.1136/spcare-2022-003562

389

Digital Poster

Initial Experience of Spatially Fractionated GRID Radiotherapy In Indonesia

Angela Giselvania 1 , Sha Chang 2 , Arie Munandar 1 , Gregorius Ben Prajogi 1 , Henry Kodrat 1 , Soehartati Gondhowiardjo 1 1 Radiation Oncology, Cipto Mangunkusumo Hospital - Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia. 2 Radiation Oncology, University of North Carolina at Chapel Hill, North Carolina, USA

Purpose/Objective:

Treatment for bulky and deep-seated tumors remains a challenge in clinical practice. Recently, the use of Spatially Fractionated Radiotherapy (SFRT) has gained renewed interest, owing to new evidence of high therapeutic ratio in both clinical and preclinical studies. By using a SFRT GRID collimator, it allows the delivery of single high-dose radiation, split into multiple smaller fields with steep dose gradients. 1-2 This study aims to report our experience with GRID to treat bulky tumor patients in Indonesia.

Material/Methods: