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Prognosis of Synchronous Colorectal Liver Metastases After Simultaneous Curative-Intent Surgery According to Primary Tumor Location and KRAS Mutational Status

 Ho Seung Kim  ;  Jong Min Lee  ;  Han Sang Kim  ;  Seung Yoon Yang  ;  Yoon Dae Han  ;  Min Soo Cho  ;  Hyuk Hur  ;  Byung Soh Min  ;  Kang Young Lee  ;  Nam Kyu Kim 
 ANNALS OF SURGICAL ONCOLOGY, Vol.27(13) : 5150-5158, 2020-12 
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Background: Tumor location and KRAS mutational status have emerged as prognostic factors of colorectal cancer. We aimed to define the prognostic impact of primary tumor location and KRAS mutational status among synchronous colorectal liver metastases (CRLM) patients who underwent simultaneous curative-intent surgery (SCIS). Methods: We compared the clinicopathologic characteristics and long-term outcomes of 227 patients who underwent SCIS for synchronous CRLM, according to tumor location and KRAS mutational status. We cross-classified tumor location and KRAS mutational status and compared survival outcomes between the four resulting patient groups. Results: Forty-one patients (18.1%) had right-sided (RS) tumors and 186 (81.9%) had left-sided (LS) tumors. One-third of tumors (78/227) harbored KRAS mutations. The KRAS mutant-type (KRAS-mt) was more commonly observed among RS tumors than among LS tumors [21/41 (51.2%) vs. 57/186 (30.6%), p = 0.012]. Median follow-up time was 43.4 months. Patients with RS tumors had shorter survival times than those with LS tumors [median disease-free survival (DFS): RS, 9.9 months vs. LS, 12.1 months, p = 0.003; median overall survival (OS): RS, 49.7 months vs. LS, 88.8 months, p = 0.039]. RS tumors were a negative prognostic factor for DFS [hazard ratio (HR) 1.878, p = 0.001] and OS (HR 1.660, p = 0.060). RS KRAS-mt and LS KRAS wild-type (KRAS-wt) tumors had the worst and best oncological outcomes, respectively. Conclusion: Tumor location has a prognostic impact in patients who underwent SCIS for CRLM, and RS KRAS-mt tumors yielded the worst oncological outcome. These results may allow for more tailored multimodality treatments.
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1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Nam Kyu(김남규) ORCID logo https://orcid.org/0000-0003-0639-5632
Kim, Han Sang(김한상) ORCID logo https://orcid.org/0000-0002-6504-9927
Min, Byung Soh(민병소) ORCID logo https://orcid.org/0000-0003-0180-8565
Yang, Seung Yoon(양승윤) ORCID logo https://orcid.org/0000-0001-8129-7712
Lee, Kang Young(이강영)
Lee, Jong Min(이종민) ORCID logo https://orcid.org/0000-0003-1654-1533
Cho, Min Soo(조민수)
Han, Yoon Dae(한윤대) ORCID logo https://orcid.org/0000-0002-2136-3578
Hur, Hyuk(허혁) ORCID logo https://orcid.org/0000-0002-9864-7229
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