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Breast-Conserving Surgery After Tumor Downstaging by Neoadjuvant Chemotherapy is Oncologically Safe for Stage III Breast Cancer Patients

Authors
Shin, Hee-ChulHan, WonshikMoon, Hyeong-GonIm, Seock-AhMoon, Woo KyungPark, In-AePark, Sung JunNoh, Dong-Young
Issue Date
Aug-2013
Publisher
SPRINGER
Citation
ANNALS OF SURGICAL ONCOLOGY, v.20, no.8, pp 2582 - 2589
Pages
8
Journal Title
ANNALS OF SURGICAL ONCOLOGY
Volume
20
Number
8
Start Page
2582
End Page
2589
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/14402
DOI
10.1245/s10434-013-2909-6
ISSN
1068-9265
1534-4681
Abstract
We conducted a retrospective study to evaluate the local recurrence (LR) rate depending on the use of neoadjuvant chemotherapy (NCT) and to determine the oncologic safety of breast-conserving surgery (BCS) after NCT by comparing LR between patients treated with BCS and mastectomy in clinical stage III breast cancer patients. Between 2004 and 2007, 166 patients underwent BCS or mastectomy after NCT (NCT group) and 193 patients underwent surgery first (surgery group) in clinical stage III breast cancer patients. Patients whose tumor size became a parts per thousand currency sign4 cm after NCT, 57 patients underwent mastectomy (mastectomy group) 39 patients underwent preplanned BCS (preplanned BCS group), and 33 patients underwent downstaged BCS (downstaged BCS group). The recurrence rates between the groups and risk factors for LR were analyzed. The 5-year LR-free survival rates were 93.6 % in the NCT group and 95.9 % in the surgery group (P = 0.108). In the NCT group, the 5-year LR-free survival rates were 96.3 % in the mastectomy group, 94.7 % in the preplanned BCS group and 90.9 % in the downstaged BCS group (P = 0.669). High expression of Ki-67 was a predictor of LR in patients in three groups (Hazard ratio 8.300, P = 0.049). Our findings suggest that BCS after NCT in clinical stage III patients is oncologically safe in terms of LR if breast tumor size is a parts per thousand currency sign4 cm after NCT and Ki-67 is a predictor of LR after NCT.
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