ESTRO 2024 - Abstract Book

S489

Clinical - Breast

ESTRO 2024

Level 1

1 (3)

Level 2

7 (23)

Level 3

6 (20)

Level 4

4 (13)

Interpectoral

3 (10)

Conclusion:

During the last five years, LN boost has been used in 18 BC patients at a single institute in Denmark. All the patients had locally advanced disease. The most common localization was IMN, and the most common RT dose was 10 Gy in 5 fractions. For the majority of the patients, the LN boost was defined from the pre-chemotherapy PET-CT scan. However, no guidelines for LN boost are available and more knowledge about the effect of a LN boost is needed to standardize the treatment. The next step in this study is to expand the population to include LABC patients treated with LN boost in all the Danish Radiotherapy Departments.

Keywords: Breast cancer, Radiotherapy, Lymph node boost

589

Poster Discussion

Pattern and Complication of Reconstructed Breast Cancer Patients with Postmastectomy Radiotherapy

Hyejo Ryu 1,2 , Kyung Hwan Shin 1,2 , Ji Hyun Chang 1,2 , Bum-Sup Jang 1,2

1 Seoul National University Hospital, Radiation Oncology, Seoul, Korea, Republic of. 2 Seoul National University College of Medicine, Radiation Oncology, Seoul, Korea, Republic of

Purpose/Objective:

This study aimed to analyze the nationwide pattern of reconstruction after mastectomy in patients with breast cancer who received postmastectomy radiotherapy (PMRT) and to compare complications according to fractionation and reconstruction procedures.

Material/Methods:

By using claim data from the National Health Insurance Service (NHIS) database, we analyzed breast cancer patients who received PMRT and underwent reconstruction between 2015 and 2020. We defined the grade ≥ 3 complications