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Is elective nodal irradiation beneficial in patients with pathologically negative lymph nodes after neoadjuvant chemotherapy and breast-conserving surgery for clinical stage II–III breast cancer? A multicentre retrospective study (KROG 12-05)

Authors
 J M Noh  ;  W Park  ;  C-O Suh  ;  K C Keum  ;  Y B Kim  ;  K H Shin  ;  K Kim  ;  E K Chie  ;  S W Ha  ;  S S Kim  ;  S D Ahn  ;  H S Shin  ;  J H Kim  ;  H-S Lee  ;  N K Lee  ;  S J Huh  ;  D H Choi 
Citation
 BRITISH JOURNAL OF CANCER, Vol.110(6) : 1420-1426, 2014 
Journal Title
 BRITISH JOURNAL OF CANCER 
ISSN
 0007-0920 
Issue Date
2014
MeSH
Adult ; Aged ; Breast Neoplasms/pathology ; Breast Neoplasms/therapy* ; Disease-Free Survival ; Female ; Humans ; Lymph Nodes/pathology* ; Lymph Nodes/surgery ; Lymphatic Irradiation/methods* ; Lymphatic Metastasis ; Middle Aged ; Neoadjuvant Therapy ; Neoplasm Staging ; Retrospective Studies ; Young Adult
Keywords
breast cancer ; neoadjuvant chemotherapy ; breast conserving surgery ; radiotherapy ; elective nodal irradiation
Abstract
BACKGROUND: To evaluate the effects of elective nodal irradiation (ENI) in clinical stage II-III breast cancer patients with pathologically negative lymph nodes (LNs) (ypN0) after neoadjuvant chemotherapy (NAC) followed by breast-conserving surgery (BCS) and radiotherapy (RT). METHODS: We retrospectively analysed 260 patients with ypN0 who received NAC followed by BCS and RT. Elective nodal irradiation was delivered to 136 (52.3%) patients. The effects of ENI on survival outcomes were evaluated. RESULTS: After a median follow-up period of 66.2 months (range, 15.6-127.4 months), 26 patients (10.0%) developed disease recurrence. The 5-year locoregional recurrence-free survival and disease-free survival (DFS) for all patients were 95.5% and 90.5%, respectively. Pathologic T classification (0-is vs 1 vs 2-4) and the number of LNs sampled (<13 vs ≥13) were associated with DFS (P=0.0086 and 0.0012, respectively). There was no significant difference in survival outcomes according to ENI. Elective nodal irradiation also did not affect survival outcomes in any of the subgroups according to pathologic T classification or the number of LNs sampled. CONCLUSIONS: ENI may be omitted in patients with ypN0 breast cancer after NAC and BCS. But until the results of the randomised trials are available, patients should be put on these trials.
Full Text
http://www.nature.com/bjc/journal/v110/n6/full/bjc201426a.html
DOI
10.1038/bjc.2014.26
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Keum, Ki Chang(금기창) ORCID logo https://orcid.org/0000-0003-4123-7998
Kim, Yong Bae(김용배) ORCID logo https://orcid.org/0000-0001-7573-6862
Suh, Chang Ok(서창옥)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/99121
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