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Mapping patterns of locoregional recurrence following contemporary treatment with radiation therapy for breast cancer: A multi-institutional validation study of the ESTRO consensus guideline on clinical target volume

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Author(s)
Jee Suk ChangJeongshim LeeMison ChunKyung Hwan ShinWon ParkJong Hoon LeeJin Hee KimWon Sup YoonIk Jae LeeJuree KimHye Li ParkYong Bae Kim
Keimyung Author(s)
Kim, Jin Hee
Department
Dept. of Radiation Oncology (방사선종양학)
Journal Title
Radiotherapy and Oncology
Issued Date
2018
Volume
126
Issue
1
Keyword
Breast cancer recurrenceClinical target volumeRadiation therapyRecurrence patterns
Abstract
BACKGROUND AND PURPOSE:
To validate the ESTRO guideline on clinical target volume (CTV) delineation for breast cancer using a multi-centre dataset.

MATERIALS AND METHODS:
Patients with axial imaging of gross locoregional recurrence (LRR) were identified from 10 participating institutions. All patients received RT, albeit not to all regional node. The location of LRR was transferred to the corresponding area on representative axial computed tomography images and compared with ESTRO-CTV.

RESULTS:
The locations of LRRs in 234 patients with 337 recurrence lesions were mapped. The ESTRO-CTV encompassed 97.6% of all LRRs, except in lymph node level 4 and the pectoralis muscle. Although 8.8% of level 4 failures occurred outside the ESTRO-CTV, cranial to the subclavian artery, all nodes were located within 6 mm cranially. Another 20% occurred posterolateral to anterior scalene muscles; however, 11/16 cases had simultaneous multiple lymph node recurrences, and 8/16 initially had N2-3 tumours. Local recurrence at the pectoralis muscle was prominent in patients undergoing mastectomy but not breast-conservation surgery (28% vs. 2.9%, P = .001).

CONCLUSIONS:
Our mapping data demonstrated that the ESTRO-CTV, with some considerations, successfully encompassed most LRRs in patients undergoing contemporary management, thus validating ESTRO-CTV to be valuable for highly conformal radiation therapy techniques.
Keimyung Author(s)(Kor)
김진희
Publisher
School of Medicine (의과대학)
Citation
Jee Suk Chang et al. (2018). Mapping patterns of locoregional recurrence following contemporary treatment with radiation therapy for breast cancer: A multi-institutional validation study of the ESTRO consensus guideline on clinical target volume. Radiotherapy and Oncology, 126(1), 139–147. doi: 10.1016/j.radonc.2017.09.031
Type
Article
ISSN
0167-8140
Source
https://linkinghub.elsevier.com/retrieve/pii/S0167-8140(17)32617-8
DOI
10.1016/j.radonc.2017.09.031
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/41345
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학)
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