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First Experience in Korea of Stereotactic Partial Breast Irradiation for Low-Risk Early-Stage Breast Cancer

Authors
 Won Hee Lee  ;  Jee Suk Chang  ;  Min Jung Kim  ;  Vivian Youngjean Park  ;  Jung Hyun Yoon  ;  Se Young Kim  ;  Jee Ye Kim  ;  Hyung Seok Park  ;  Seung Il Kim  ;  Young Up Cho  ;  Byeong Woo Park  ;  Yong Bae Kim 
Citation
 FRONTIERS IN ONCOLOGY, Vol.10 : 672, 2020-04 
Journal Title
 FRONTIERS IN ONCOLOGY 
Issue Date
2020-04
Keywords
Korean ; accelerated partial breast irradiation ; breast cancer ; dosimetric outcomes ; early toxicity ; feasibility studies ; stereotactic partial breast irradiation
Abstract
Purpose: Accelerated partial breast irradiation (A-PBI) in Korean women has been considered impracticable, owing to small breast volume and lack of high-precision radiotherapy experience. We present the first experience of stereotactic-PBI (S-PBI) with CyberKnife M6 to investigate feasibility of use and early toxicities in Korean women with early breast cancers. Materials and Methods: A total of 104 breasts receiving S-PBI at our institution between September 2017 and October 2018 were reviewed. Patients were selected based on the American Society for Radiation Oncology (ASTRO), American Brachytherapy Society, American Society of Breast Surgeons, and Groupe Européen de Curiethérapie-European Society for Therapeutic Radiology and Oncology guidelines. A dose of 30 Gy in 5 fractions (NCT01162200) was used. Gold fiducials were routinely inserted near the tumor bed for tracking. Constraints regarding organs-at-risk followed the NSABP-B39/RTOG 0413 protocol. Results: Median follow-up was for 13 months. Patients were categorized as "suitable" (71.2%) or "cautionary" (28.8%) according to 2017 the ASTRO guidelines. No tracking failure of inserted gold fiducials occurred. Median planning target volume (PTV) and PTV-to-whole breast volume ratio was 73.6 mL (interquartile range, 58.8-103.9 mL) and 17.0% (13.3-19.1%), respectively. Median PTV V95%, PTV Dmax, and ipsilateral breast V50% were 97.8% (96.2-98.8%), 105.3% (104.2-106.4%), and 35.5% (28.3-39.8%), respectively. No immediate post-S-PBI toxicity ≥ grade 2 was reported, except grade 2 induration in three breasts. All patients remain disease-free to date. Conclusion: The first use of S-PBI in Korean women was feasible and safe for selected early breast cancer. Based on these results, we have initiated a prospective study (NCT03568981) to test S-PBI in whole-breast irradiation for low-risk early breast cancer.
Files in This Item:
T202002363.pdf Download
DOI
10.3389/fonc.2020.00672
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Min Jung(김민정) ORCID logo https://orcid.org/0000-0003-4949-1237
Kim, Seung Il(김승일)
Kim, Yong Bae(김용배) ORCID logo https://orcid.org/0000-0001-7573-6862
Kim, Jee Ye(김지예) ORCID logo https://orcid.org/0000-0003-3936-4410
Park, Byeong Woo(박병우) ORCID logo https://orcid.org/0000-0003-1353-2607
Park, Vivian Youngjean(박영진) ORCID logo https://orcid.org/0000-0002-5135-4058
Park, Hyung Seok(박형석) ORCID logo https://orcid.org/0000-0001-5322-6036
Yoon, Jung Hyun(윤정현) ORCID logo https://orcid.org/0000-0002-2100-3513
Lee, Won Hee(이원희) ORCID logo https://orcid.org/0000-0002-0950-1851
Chang, Jee Suk(장지석) ORCID logo https://orcid.org/0000-0001-7685-3382
Cho, Young Up(조영업) ORCID logo https://orcid.org/0000-0003-2936-410X
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/179122
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