ESTRO 2025 - Abstract Book

S1066

Clinical – Head & neck

ESTRO 2025

Conclusion: We demonstrate excellent symptom benefit and local control at one year following palliative treatment with 50Gy in 20 fractions. The addition of planned or unplanned breaks did not detriment outcomes significantly but was associated with a significant reduction in acute grade 3 toxicity. This regime can be considered for palliative patients where durable local control is of clinical value.

Keywords: Palliative, treatment Break,Hypofractionated

3178

Digital Poster Regional recurrence rates in clinically node negative sinonasal cancers without elective neck treatment osagie Igiebor 1 , Justin steinman 2 , Joseph Adedigba 1 , John Kaczmar 3 , Alexander Kejner 4 , Abergotti William 4 , Jason Newman 4 , Jennifer Harper 1 , Bhishamjit Chera 1 1 Radiation oncology, Medical university of south carolina, charleston, USA. 2 Radiation oncology, Alabama cancer care, Alabama, USA. 3 hematology/oncology, Medical university of south carolina, charleston, USA. 4 Head and neck oncology, Medical university of south carolina, charleston, USA Purpose/Objective: Sinonasal malignancies represent a rare and histologically diverse subset of head and neck cancers. Optimal management entails maximal safe resection followed by adjuvant radiation +/- chemotherapy, however there is controversy regarding radiation treatment volumes in the adjuvant setting. In this retrospective review, we sought to examine the rates of regional recurrence in clinically node negative (cN0) sinonasal cancer patients treated with