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. 2017 May 23;116(11):1444-1450.
doi: 10.1038/bjc.2017.108. Epub 2017 Apr 20.

Tumour invasiveness, the local and systemic environment and the basis of staging systems in colorectal cancer

J H Park  1   2 , H van Wyk  1 , C S D Roxburgh  1 , P G Horgan  1 , J Edwards  2 , D C McMillan  1
Affiliations

Tumour invasiveness, the local and systemic environment and the basis of staging systems in colorectal cancer

J H Park et al. Br J Cancer. .

Abstract

Background: The present study aimed to examine the relationship between tumour invasiveness (T stage), the local and systemic environment and cancer-specific survival (CSS) of patients with primary operable colorectal cancer.

Methods: The tumour microenvironment was examined using measures of the inflammatory infiltrate (Klintrup-Makinen (KM) grade and Immunoscore), tumour stroma percentage (TSP) and tumour budding. The systemic inflammatory environment was examined using modified Glasgow Prognostic Score (mGPS) and neutrophil:lymphocyte ratio (NLR). A 5-year CSS was examined.

Results: A total of 331 patients were included. Increasing T stage was associated with colonic primary, N stage, poor differentiation, margin involvement and venous invasion (P<0.05). T stage was significantly associated with KM grade (P=0.001), Immunoscore (P=0.016), TSP (P=0.006), tumour budding (P<0.001), and elevated mGPS and NLR (both P<0.05). In patients with T3 cancer, N stage stratified survival from 88 to 64%, whereas Immunoscore and budding stratified survival from 100 to 70% and from 91 to 56%, respectively. The Glasgow Microenvironment Score, a score based on KM grade and TSP, stratified survival from 93 to 58%.

Conclusions: Although associated with increasing T stage, local and systemic tumour environment characteristics, and in particular Immunoscore, budding, TSP and mGPS, are stage-independent determinants of survival and may be utilised in the staging of patients with primary operable colorectal cancer.

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Conflict of interest statement

The authors declare no conflict of interest.

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