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2017 ; 116
(11
): 1444-1450
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Tumour invasiveness, the local and systemic environment and the basis of staging
systems in colorectal cancer
#MMPMID28427085
Park JH
; van Wyk H
; Roxburgh CSD
; Horgan PG
; Edwards J
; McMillan DC
Br J Cancer
2017[May]; 116
(11
): 1444-1450
PMID28427085
show ga
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.