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학술저널
저자정보
박영희 (이화여자대학교 부속 서울병원 방사선종양학과) 김태현 (국립암센터) 김규보 (서울대학교병원) 유정일 (삼성서울병원) 정원근 (이화의대부속목동병원) 성진실 (연세대학교) 김우철 (인하대학교) 최진화 (중앙대학교) 장아람 (순천향대학교) 정배권 (경상국립대학교) 김태규 (성균관대학교) 김진희 (계명대학교) 박혜진 (한양대학교) 신현수 (차의과학대학교 분당차병원) 임정호 (차의과학대학교 분당차병원) 지의규 (서울대학교)
저널정보
대한암학회 Cancer Research and Treatment Cancer Research and Treatment Vol.56 No.1
발행연도
2024.1
수록면
272 - 279 (8page)
DOI
10.4143/crt.2023.616

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Purpose Risk factors predicting distant metastasis (DM) in extrahepatic bile duct cancer (EHBDC) patients treated with curative resection were investigated.Materials and Methods Medical records of 1,418 EHBDC patients undergoing curative resection between Jan 2000 and Dec 2015 from 14 institutions were reviewed. After resection, 924 patients (67.6%) were surveilled without adjuvant therapy, 297 (21.7%) were treated with concurrent chemoradiotherapy (CCRT) and 148 (10.8%) with CCRT followed by chemotherapy. To exclude the treatment effect from innate confounders, patients not treated with adjuvant therapy were evaluated.Results After a median follow-up of 36.7 months (range, 2.7 to 213.2 months), the 5-year distant metastasis-free survival (DMFS) rate was 57.7%. On multivariate analysis, perihilar or diffuse tumor (hazard ratio [HR], 1.391; p=0.004), poorly differentiated histology (HR, 2.014; p < 0.001), presence of perineural invasion (HR, 1.768; p < 0.001), positive nodal metastasis (HR, 2.670; p < 0.001) and preoperative carbohydrate antigen (CA) 19-9 ≥ 37 U/mL (HR, 1.353; p < 0.001) were significantly associated with inferior DMFS. The DMFS rates significantly differed according to the number of these risk factors. For validation, patients who underwent adjuvant therapy were evaluated. In patients with ≥ 3 factors, additional chemotherapy after CCRT resulted in a superior DMFS compared with CCRT alone (5-year rate, 47.6% vs. 27.7%; p=0.001), but the benefit of additional chemotherapy was not observed in patients with 0-2 risk factors.Conclusion Tumor location, histologic differentiation, perineural invasion, lymph node metastasis, and preoperative CA 19-9 level predicted DM risk in resected EHBDC. These risk factors might help identifying a subset of patients who could benefit from additional chemotherapy after resection.

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