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Annals of Surgical Oncology

, Volume 21, Issue 12, pp 3938–3946 | Cite as

The Emerging Role of Neutrophil to Lymphocyte Ratio in Determining Colorectal Cancer Treatment Outcomes: A Systematic Review and Meta-Analysis

  • George Malietzis
  • Marco Giacometti
  • Robin H. Kennedy
  • Thanos Athanasiou
  • Omer Aziz
  • John T. JenkinsEmail author
Colorectal Cancer

Abstract

Background

There is growing evidence suggesting that the neutrophil to lymphocyte ratio (NLR) can act as an independent predictor of long-term outcomes in patients undergoing treatment for colorectal cancer (CRC). This study aims to systematically review the role of NLR in predicting survival for patients with CRC undergoing treatments, and to evaluate its utility within a CRC surveillance program.

Methods

This meta-analysis was performed according to PRISMA guidelines. Outcomes of interest included disease-free survival (DFS) for patients undergoing treatment with curative intent and progression-free survival (PFS) in patients undergoing treatments with palliative intent.

Results

Thirteen observational cohort studies published from 2007 to 2013 evaluated the role of NLR as a predictor of outcome following treatment for CRC. These included (i) patients undergoing surgery to resect the primary cancer (seven studies); (ii) those undergoing palliative chemotherapy (three studies); and (iii) patients undergoing potentially curative treatments for CRC liver metastases (three studies). When all studies were considered, a high pretreatment NLR independently predicted survival (HR 2.08; 95 % CI 1.64–2.64). A high NLR also predicted significantly poorer survival in each of the three groups. Finally, over a 3-year follow-up period, high NLR became a significant predictor of poor outcome at year 2 (HR 2.76; 95 % CI 2.06–3.69; p < 0.00001) and 3 (HR 2.03; 95 % CI 1.48–2.78; p < 0.0001), but not in the first year of follow-up (HR 1.47; 95 % CI 0.89–2.41; p = 0.13).

Conclusions

Elevated preoperative NLR is associated with poorer survival in CRC patients undergoing treatment and may have a role in CRC surveillance programs as a means of delivering more personalized cancer care.

Keywords

Palliative Chemotherapy Glasgow Prognostic Score Scottish Intercollegiate Guideline Network Neutrophil Lymphocyte Ratio Muscle Mass Depletion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgement

None

Conflicts of Interest

George Malietzis, Marco Giacometti, Robin H. Kennedy, Thanos Athanasiou, Omer Aziz, and John T. Jenkins declare they have no conflicts of interest.

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Copyright information

© Society of Surgical Oncology 2014

Authors and Affiliations

  • George Malietzis
    • 1
    • 2
  • Marco Giacometti
    • 1
  • Robin H. Kennedy
    • 1
    • 2
  • Thanos Athanasiou
    • 2
  • Omer Aziz
    • 1
    • 2
  • John T. Jenkins
    • 1
    • 2
    Email author
  1. 1.Department of SurgerySt. Mark’s HospitalHarrowUK
  2. 2.Department of Surgery and CancerImperial College LondonLondonUK

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