학술논문
Different approaches to target volume definition and boost delivery in surgery de-escalation clinical trial in breast cancer patients with pathological complete response
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- 영문명
- Different approaches to target volume definition and boost delivery in surgery de-escalation clinical trial in breast cancer patients with pathological complete response
- 발행기관
- 대한방사선종양학회
- 저자명
- Sergey Nikolaevich Novikov Petr Krivorotko Zhanna Bryantseva Irina Akulova Alexander Emelyanov Viktoria Mortada Olga Ponomareva Pavel Krzhivitskiy Sergey Kanaev
- 간행물 정보
- 『대한방사선종양학회지』제41권 제4호, 267~273쪽, 전체 7쪽
- 주제분류
- 의약학 > 종양학
- 파일형태
- 발행일자
- 2023.12.31
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국문 초록
영문 초록
Purpose: We evaluate various approaches to target volume definition and boost delivery in patients with complete response to neoadjuvant systemic therapy (NST) who were treated by radiotherapy without a surgery.
Materials and Methods: A pathological complete response (pCR) was diagnosed in 21 of 27 patients included in “surgery de-escalation” prospective observation study. Clips were placed in the primary tumor volume (PrTV) before NST and during the vacuum aspiration biopsy. Twenty patients with pCR underwent the whole breast irradiation and a boost to the PrTV. High-dose rate brachytherapy (HDRB) was the basic technique for boost delivery. Finally, we identified the value of fused images (computed tomography [CT] before NST with simulation CT), clips and their combination for an accurate boost delivery.
Results: A complete overlap between PrTV on pre-treatment CT with the localization of the clips on simulation CT was mentioned in 10, partial mismatch in three patients. In 12 of these 13 women, HDRB was successfully used for the boost delivery. In five cases we mentioned a marked discrepancy between the PrTV on fused images and the topography of the clips. In other two women we did not find clips on simulation CT. The fused images in five of these seven patients showed anatomical landmarks (scar, fibrosis) used for identification of the gross tumor volume. In all 20 women with pCR (average follow-up of 16.6 months), there were no locoregional recurrences.
Conclusion: Combination of the clips with fusion of pre-NST and simulation CTs is important for an accurate boost delivery.
목차
Introduction
Materials and Methods
Results
Discussion and Conclusion
Statement of Ethics
Conflict of Interest
Funding
Author Contributions
Data Availability Statement
References
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