Survival Outcomes of Patients with Colorectal Liver Metastases Following Hepatic Resection or Ablation in the Era of Effective Chemotherapy

Abstract

The outcome of patients with colorectal liver metastases (CLM) undergoing surgical resection in the era of effective chemotherapy is not widely reported. In addition, factors associated with disease-specific survival (DSS) in a contemporary series of patients are not well defined. Clinical, pathologic, and outcome data for 64 patients with CLM treated by a single surgeon in a multidisciplinary setting from February 2002 to October 2007 were examined. Hepatic resection was combined with radiofrequency ablation (RFA) in 23 (36%) cases. Secondary or tertiary resection was undertaken in 12 (19%) patients. Synchronous CLM were noted in 25 (39%) cases. Neoadjuvant chemotherapy was given to 41 (64%) patients. Following hepatic resection, adjuvant chemotherapy was administered in 52 (81%) cases. There was one (2%) operative mortality. One or more complications were noted in 24 (38%) patients. Median length of hospital stay was 7 (2-7) days. Five-year DSS and overall survival were 72% and 69%, respectively. Bilobar disease (p < 0.001), local tumor extension (p = 0.02), response to neoadjuvant chemotherapy (p = 0.005), preoperative portal vein embolization (p = 0.05), number of hepatic lesions (p = 0.03), positive resection margin (p < 0.001), and node-positive primary disease (p = 0.001) were prognostically significant factors on univariate analysis. On multivariate analysis, bilobar disease (p = 0.02) and local tumor extension (p = 0.02) were the only two independent prognostic factors. We conclude that, in patients with CLM, a multidisciplinary approach encompassing an aggressive surgical policy achieves excellent 5-year survival results with acceptable operative morbidity and mortality. Bilobar disease and local extrahepatic extension of cancer appear to be independent prognostic factors for long-term survival.