Abstract

AimTo evaluate the impact of anti-platelet therapy on the outcomes of patients undergoing liver resection for CRLM. Secondary aim was to determine whether anti-platelet therapy influenced histo-pathological changes in CRLM. MethodsPatients treated with liver resection for CRLM were identified from a prospectively maintained hepatobiliary database during an 11-year period. Collated data included demographics, primary tumour treatment, surgical data, histopathology analysis and clinical outcome. Results454 patients that underwent primary hepatic resections for CRLM were included. 60 patients were on anti-platelet therapy. 241 patients developed recurrent disease and 131 patients have died. Multi-variate analysis identified 4 independent predictors of disease-free survival: tumour number; tumour size; peri-neural invasion; and resection margin. The presence of peri-neural invasion and multiple hepatic metastases were independent predictors of poorer overall survival on multi-variate analysis. Uni-variate analysis showed that the use of anti-platelet therapy was associated with larger tumour size (p=0.031) and vascular invasion (p=0.023). ConclusionAnti-platelet therapy does not affect the survival outcome in patients with CRLM following liver resection. Anti-platelet therapy is associated with larger liver metastases and vascular invasion on histo-pathological analysis. SynopsisA large retrospective study looking at outcomes of patients taking pre operative anti platelet therapy who have undergone liver resection for colorectal liver metastases.

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