%0 Journal Article
%T Prognostic Impact of Elective Supraclavicular Nodal Irradiation for Patients with N1 Breast Cancer after Lumpectomy and Anthracycline Plus Taxane-Based Chemotherapy (KROG 1418): A Multicenter Case-Controlled Study.
%A Kim H
%A Park W
%A Yu JI
%A Choi DH
%A Huh SJ
%A Kim YJ
%A Lee ES
%A Lee KS
%A Kang HS
%A Park IH
%A Shin KH
%A Wee CW
%A Kim K
%A Park KR
%A Kim YB
%A Ahn SJ
%A Lee JH
%A Kim JH
%A Chun M
%A Lee HS
%A Kim JS
%A Cha J
%J Cancer Res Treat
%V 49
%N 4
%D Oct 2017
%M 28052649
%F 5.036
%R 10.4143/crt.2016.382
%X <B>OBJECTIVE: </B>This study was conducted to evaluate the impact of supraclavicular lymph node radiotherapy (SCNRT) on N1 breast cancer patients receiving post-lumpectomy whole-breast irradiation (WBI) and anthracycline plus taxane-based (AT) chemotherapy.<BR><B>METHODS: </B>We performed a case-control analysis to compare the outcomes of WBI and WBI plus SCNRT (WBI+SCNRT). Among 1,147 patients with N1 breast cancer who received post-lumpectomy radiotherapy and AT-based chemotherapy in 12 hospitals, 542 were selected after propensity score matching. Patterns of failure, disease-free survival (DFS), distant metastasis-free survival (DMFS), and treatment-related toxicity were compared between groups.<BR><B>RESULTS: </B>A total of 41 patients (7.6%) were found to have recurrence. Supraclavicular lymph node (SCN) failure was detected in three patients, two in WBI and one in WBI+SCNRT. All SCN failures were found simultaneously with distant metastasis. There was no significant difference in patterns of failure or survival between groups. The 5-year DFS and DMFS for patients with WBI and WBI+SCNRT were 94.4% versus 92.6% (p=0.50) and 95.1% versus 94.5% (p=0.99), respectively. The rates of lymphedema and radiation pneumonitis were significantly higher in the WBI+SCNRT than in the WBI.<BR><B>CONCLUSIONS: </B>We did not find a benefit of SCNRT for N1 breast cancer patients receiving AT-based chemotherapy.