ESTRO 2024 - Abstract Book

S538

Clinical - Breast

ESTRO 2024

Material/Methods:

We conducted a retrospective audit on 135 patients who had undergone ANC breast surgery in two different institutions followed by radical radiotherapy to the breast and SCF (+/- internal mammary chain (IMC) between 20.07.20 and 31.12.22. We documented the position of the lateral field border of the axilla/ SCF radiation field and reviewed the corresponding position of the most medial and superior ANC clip and operation notes. We also recorded if the SCF radiotherapy field matched or overlapped the borders of the surgical clips or if there were potentially untreated regions of the axilla.

Results:

The number of surgeons undertaking these procedures (as named senior surgeons) was 14. The number of radiation Oncologists undertaking the definition of radiation volumes was 5.

Of the 135 patients who had axilla/ SCF radiotherapy, we found that 63 (46.7%) of patients had SCF radiotherapy fields which matched the position of ANC clips, 57 (42.7%) of patients who had a potentially untreated region of the axilla and 15 (11.1%) with overlap. Work is ongoing to define intra and inter-operator variability and to define a pragmatic and evidence-based system for matching operative and surgical beds in this setting.

Conclusion:

We demonstrated variation between and within individual radiation oncologists about the apparent matching of axillary surgical and radiation fields. We identified patients who may have had a region of their axilla untreated (a gap) which potentially poses a risk of local recurrence. Overlap may increase the risk of lymphedema. This data highlights the need for a standardised practice guideline on the position of the lateral field of the SCF radiotherapy field.

Keywords: Breast Axilla RTT

1173

Digital Poster

Could musictherapy change colors perception's way in breast cancer patients undergoing radiotherapy?

Fatma Dhouib 1 , Ahmed Jribi 1 , Rim Trigui 1 , Imene Baati 2 , Salma Hentati 2 , Wafa Mnejja 1 , Jamel Daoud 1

1 Habib Bourguiba University Hospital, Oncology radiotherapy, Sfax, Tunisia. 2 Hedi Chaker University Hospital, Psychiatry, Sfax, Tunisia

Purpose/Objective: