ESTRO 2024 - Abstract Book

S464

Clinical - Breast

ESTRO 2024

Conclusion:

Although RNI with IMNI using arc technique may be beneficial with no prominent adverse effects, our results suggest that sparing IMNI could also be considered in patients presenting with pathological N3 and hormone negative disease.

Keywords: internal mammary node irradiation, arc technique

References:

1. Kim YB, Byun HK, Kim DY, et al. Effect of Elective Internal Mammary Node Irradiation on Disease-Free Survival in Women with Node-Positive Breast Cancer: A Randomized Phase 3 Clinical Trial. JAMA Oncol. 2022;8(1):96 – 105. doi:10.1001/jamaoncol.2021.6036 2. Thorsen LBJ, Overgaard J, Matthiessen LW, Berg M, Stenbygaard L, Pedersen AN, Nielsen MH, Overgaard M, Offersen BV; DBCG Radiotherapy Committee. Internal Mammary Node Irradiation in Patients with Node-Positive Early Breast Cancer: Fifteen-Year Results from the Danish Breast Cancer Group Internal Mammary Node Study. J Clin Oncol. 2022 Dec 20;40(36):4198-4206.

3. NCCN. NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) — Breast Cancer (Version 4.2023).

339

Poster Discussion

Stereotactic Ablative Radiotherapy Outcomes for Bone-Only Oligometastatic Breast Cancer

Melek Tugce Yilmaz, Melis Gultekin, Sezin Yuce Sari, Tolunay Kumru, Huseyin Kivanc, Gokhan Ozyigit, Ferah Yildiz

Hacettepe University, Radiation Oncology, Ankara, Turkey