ObjectiveTo examine trends in outcomes of patients undergoing resection at a single tertiary care referral center over a 16-year period.
Summary Background DataHepatic resection is considered the treatment of choice in selected patients with colorectal metastasis confined to the liver. Although a variety of retrospective studies have demonstrated improvements in short-term outcomes in recent years, changes in long-term survival over time are less well-established.
MethodsData from 226 consecutive patients undergoing potentially curative liver resection for colorectal metastases between 1984 and 1999 were analyzed. Actuarial survival rates related to prognostic determinants were analyzed using the log-rank test.
ResultsThe median survival for the entire cohort was 46 months, with 5-and 10-year survival rates of 40% and 26% respectively.Ninety-three patients operated on between 1984 and 1992 were found to have an overall survival of 31% at 5 years, compared to 58% for the 133 patients operated on during the more recent period (1993)(1994)(1995)(1996)(1997)(1998)(1999). Both overall and diseasefree survival were significantly better in the recent time period compared with the earlier period on both univariate and multivariate analyses. Other independent factors associated with improved survival included number of metastatic tumors Յ 3, negative resection margin, and CEA Ͻ 100. Comparisons were made between time periods for a variety of patient, tumor and treatment-related factors. Among all parameters studied, only resection type (anatomical versus nonanatomical), use of intraoperative ultrasonography, and perioperative chemotherapy administration differed between the early and recent time periods.
ConclusionsLong-term survival following liver resection for colorectal metastases has improved significantly in recent years at our institution. Although the reasons for this survival trend are not clear, contributing factors may include the use of newer preoperative and intraoperative imaging, increased use of chemotherapy, and salvage surgical therapy.Hepatic resection has gained acceptance as the most effective therapy for patients with colorectal metastases confined to the liver. Advances in surgical planning, operative technique, and perioperative care have resulted in improved short-term outcomes, with experienced centers now reporting in-hospital mortality rates of less than 5%, even with major resections.
1-5Long-term survival and potential for cure following surgical resection for hepatic colorectal metastases have been demonstrated in numerous uncontrolled studies. In most series, the overall 5-year survival rate reported following hepatic resection with curative intent ranges from 25%-37%, and with median survival of between 24 and 40 months.1-3,6 -10 As hepatic resections have become safer and indications have broadened, there are increasing expectations regarding assessment of trends in long-term patient outcomes. Although some improvement in survival are being reported in more recent series compared with th...
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