Annals of Oncology Advance Access published online on April 13, 2007
Annals of Oncology, doi:10.1093/annonc/mdm106
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© 2007 European Society for Medical Oncology
Effect of subcentimeter nonpositive resection margin on hepatic recurrence in patients undergoing hepatectomy for colorectal liver metastases. Evidences from 663 liver resections

1 Department of Surgery, Hospital de Girona "Josep Trueta", Girona
2 Department of Surgery, Bellvitge Hospital, Barcelona
3 Assessoria Metodològica en Investigació Biomèdica, Institut Municipal Investigacions Mediques, Barcelona, Spain
* Correspondence to: Dr J. Figueras, Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Hospital de Girona "Dr Josep Trueta", Crta de França s/n 17007 Girona, Spain. Tel: +34 972940256; Fax: +34 972940270; E-mail: info{at}jfigueras.net
Objective: To elucidate if a nonpositive <1-cm resection margin has any effect on hepatic recurrence in patients undergoing liver resection for colorectal liver metastases.
Patients and methods: Six hundred and nine patients underwent 663 liver resections. Patients with positive margin were excluded from the analysis. Two groups were studied: group A, <1-cm resection margin and group B,
1-cm resection margin.
Results: A total of 545 liver resections in 523 patients were carried out with nonpositive resection margins. With a median follow-up of 25 months, the 5-year cumulative hepatic recurrence reached 54% in group A (n = 206) and 41% in group B (n = 339). Factors associated with hepatic recurrence were synchronic metastases (P = 0.0015), bilobar (P < 0.001), two or more metastases (P < 0.001), margin <1 cm (P = 0.0123) and extrahepatic disease (P = 0.0037). A strong correlation between resection margin and number of metastases was confirmed (P < 0.001). At multivariate analysis only two factors were independent predictors of hepatic recurrence: multinodular disease in the liver specimen [
4 metastases hazard ratio (HR) = 3.45; 95% confidence interval (CI): 2.25.38; P < 0.001] and extrahepatic disease at hepatectomy (HR = 1.58; 95% CI: 1.583.32).
Conclusion: Subcentimeter nonpositive resection margins do not directly influence hepatic recurrence in patients undergoing hepatectomy for colorectal liver metastases.
colorectal cancer, hepatectomy, liver metastases, liver neoplasms, liver surgery, resection margin
Present address: Department of Surgery, Hospital del Mar, Barcelona, Spain Received for publication December 17, 2006. Revision received February 16, 2007. Accepted for publication February 19, 2007.
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