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학술저널
저자정보
Yeo, Seung-Gu (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center) Kim, Dae Yong (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center) Kim, Tae Hyun (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center) Kim, Sun Young (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center) Baek, Ji Yeon (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center) Chang, Hee Jin (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center) Park, Ji Won (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center) Oh, Jae Hwan (Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center)
저널정보
아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제15권 제13호
발행연도
2014.1
수록면
5,383 - 5,387 (5page)

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Purpose: To investigate whether pretreatment serum carbohydrate antigen 19-9 (CA 19-9) levels are associated with pathological responses to preoperative chemoradiotherapy (CRT) in patients with rectal cancer. Materials and Methods: In total, 260 patients with locally advanced rectal cancer (cT3-4NanyM0) who underwent preoperative CRT and radical surgery were analyzed retrospectively. CRT consisted of 50.4 Gy pelvic radiotherapy and concurrent chemotherapy. Radical surgery was performed at a median of 7 weeks after CRT completion. Pathological CRT response criteria included downstaging (ypStage 0-I) and ypT0-1. A discrimination threshold of CA 19-9 level was determined using a receiver operating characteristics analysis. Results: The median CA 19-9 level was 8.0 (1.0-648.0) U/mL. Downstaging occurred in 94 (36.2%) patients and ypT0-1 in 50 (19.2%). The calculated optimal threshold CA 19-9 level was 10.2 U/mL for downstaging and 9.0 U/mL for ypT0-1. On multivariate analysis, CA 19-9 (${\leq}9.0U/mL$) was significantly associated with downstaging (odds ratio, 2.089; 95% confidence interval, 1.189-3.669; P=0.010) or ypT0-1 (OR, 2.207; 95%CI, 1.079-4.512; P=0.030), independent of clinical stage or carcinoembryonic antigen. Conclusions: This study firstly showed a significant association of pretreatment serum CA 19-9 levels with pathological CRT responses of rectal cancer. The CA 19-9 level is suggested to be valuable in predicting CRT responses of rectal cancer cases before treatment.

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