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Effect of KRAS Mutation on Long-Term Outcomes of Patients Undergoing Hepatic Resection for Colorectal Liver Metastases

  • Gastrointestinal Oncology
  • Published:
Annals of Surgical Oncology Aims and scope Submit manuscript

Abstract

Purpose

To investigate the prognostic value of KRAS in a large cohort of patients undergoing liver resection for colorectal liver metastases (CRLM).

Methods

Between 2003 and 2013, 334 patients underwent hepatic resection for CRLM at Johns Hopkins Hospital and met the inclusion criteria. Clinicopathologic characteristics, perioperative details, and outcomes were stratified by KRAS status—mutant KRAS (mtKRAS) versus wild-type KRAS (wtKRAS)—and analyzed.

Results

mtKRAS was identified in 115 (34.4 %) patients. At a median follow-up of 28.2 months, recurrence was observed in 59 (51.3 %) patients with mtKRAS and 117 (53.4 %) patients with wtKRAS (P = 0.79); there was no difference in the pattern of recurrence (liver: mtKRAS 39.0 % vs. wtKRAS 52.1 %; lung: mtKRAS 55.6 % vs. wtKRAS 64.3 %; both P > 0.05). Although 5-year log-rank overall survival (OS) was comparable among mtKRAS (41.6 %) vs. wtKRAS (48.5 %), on multivariable Cox survival analysis and after adjusting for known predictors of OS mtKRAS was associated with worse OS (hazard ratio 1.65; 95 % confidence interval 1.07–2.54; P = 0.02). Among patients who experienced a recurrence, 5-year OS was worse among those patients who had mtKRAS (mtKRAS 28.1 % vs. wtKRAS 44.5 %; P = 0.004). After controlling for tumor factors and receipt of chemotherapy, mtKRAS status remained independently associated with a worse outcome among patients who experienced recurrence (hazard ratio 2.07; 95 % confidence interval 1.31–3.27; P = 0.002).

Conclusions

mtKRAS was noted in one-third of patients with CRLM. Although KRAS status did not affect the pattern of recurrence and recurrence-free survival, mtKRAS was an independent predictor of worse OS. The effect was more pronounced among patients who experienced a recurrence after resection of CRLM.

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Disclosure

The authors declare no conflict of interest.

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Authors and Affiliations

  1. Department of Surgery, Johns Hopkins Hospital, Baltimore, MD, USA

    Georgios A. Margonis MD, PhD, Gaya Spolverato MD, Yuhree Kim MD, MPH, Georgios Karagkounis MD, Michael A. Choti MD & Timothy M. Pawlik MD, MPH, PhD

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  1. Georgios A. Margonis MD, PhD
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  2. Gaya Spolverato MD
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  3. Yuhree Kim MD, MPH
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  4. Georgios Karagkounis MD
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  5. Michael A. Choti MD
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  6. Timothy M. Pawlik MD, MPH, PhD
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Corresponding author

Correspondence to Timothy M. Pawlik MD, MPH, PhD.

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Margonis, G.A., Spolverato, G., Kim, Y. et al. Effect of KRAS Mutation on Long-Term Outcomes of Patients Undergoing Hepatic Resection for Colorectal Liver Metastases. Ann Surg Oncol 22, 4158–4165 (2015). https://doi.org/10.1245/s10434-015-4587-z

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  • DOI: https://doi.org/10.1245/s10434-015-4587-z

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