Abstract
BackgroundClinical data reported a relationship between neutrophil-related variables and poor prognosis in patients with metastatic colorectal cancer (mCRC), but only platelet-to-lymphocyte ratio has been reported as prognostic. Patients and MethodsA retrospective analysis of 145 patients with mCRC, who received chemotherapy at the department of Oncology of the Ospedale Civile di Sanremo in 2010 to 2013, was performed, and a Cox model was built. ResultsIn the model, some variables were independently related with overall survival (OS) (resection of the primary tumor, number of drugs included in the first-line chemotherapy regimen), whereas neutrophil-related ones were not. However, after stratification by tumor location, neutrophil-related variables appeared associated with a poor survival among patients with a left-sided mCRC, and in particular, among those ones with a rectal tumor (hazard ratio, 3.732; 95% confidence interval, 1.575-8.845). ConclusionNeutrophil-related variables predicted outcome in patients with left-sided mCRC only. A high prevalence of consensus molecular subtype 4 CRC in patients with metastatic cancer of the rectum is suggested.
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