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Current usage of stereotactic body radiotherapy for oligometastatic prostate cancer in Korea: patterns of care survey (KROG 19-08)

Authors
Bae, Sun HyunIl Jang, WonKang, Hyun-CheolIl Kim, YoungKim, Yong HoKim, Woo ChulLee, Hee KwanKim, Jin Ho
Issue Date
Aug-2021
Publisher
AME Publishing Company
Keywords
Korea; oligometastases; prostate cancer (PC); stereotactic body radiotherapy (SBRT); survey
Citation
Annals of Translational Medicine, v.9, no.16, pp 1 - 11
Pages
11
Journal Title
Annals of Translational Medicine
Volume
9
Number
16
Start Page
1
End Page
11
URI
https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/19847
DOI
10.21037/atm-21-1116
ISSN
2305-5839
2305-5847
Abstract
Background: Growing evidence suggests that metastasis-directed therapy and/or prostate-directed therapy may benefit patients with oligometastatic prostate cancer (OMPC). Stereotactic body radiotherapy (SBRT) is increasingly used to treat oligometastases in various cancers. The purpose of this study was to investigate the current patterns of curative-intent SBRT for OMPC in Korea. Methods: A 20-item questionnaire was sent to 326 radiation oncologists in 93 institutions in Korea. Only 1 physician per institution was required to complete the survey. Subsequently, the second survey consisting of 3 clinical scenarios was sent to 64 physicians with clinical experience in SBRT: case 1, cT4N0M1 (direct invasion to two pelvic bones); case 2, cT2N0M1 (three bone metastases); and case 3, solitary spine metastasis after radical prostatectomy. Results: Seventy-six physicians from 93 institutions (82%) answered the first survey. The multidisciplinary team approach was practiced in 16 institutions (21%). Most physicians (75%) agreed on the definition of oligometastases as limited lesions and/or organs <= 5: 25% agreed with low-volume disease according to CHAARTED trial. During the last year, 49 physicians (64%) treated OMPC patients with curative intent. Sixty four physicians (84%) had a clinical experience with SBRT: 48 (75%) stated that both dose and fraction number should be considered when defining SBRT, whereas others (25%) stated that only fraction size should be considered. Fifty-five faculties (86%) answered the second survey. Physicians agreed with oligometastases in 89% for case 1, in 80% for case 2, and in 100% for case 3. The rate of SBRT application was the highest in case 3 (70%). Conclusions: There was diversity in the patterns of SBRT for OMPC in Korea. Additional prospective studies are necessary to strengthen evidence regarding role of SBRT in OMPC.
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