Intraoperative margin re-resection for colorectal liver metastases

Area of Science:

• Surgical Oncology
• Hepatobiliary Surgery
• Colorectal Cancer Research

Background:

• Colorectal cancer (CRC) liver metastases are a common challenge.
• Surgical resection is a primary treatment modality.
• Optimizing surgical margins is crucial for patient outcomes.

Purpose of the Study:

• To evaluate the impact of intraoperative margin re-resection on recurrence and survival in patients with CRC liver metastases.
• To compare outcomes based on resection margin (MOR) and re-resection margin (re-MOR) distances.

Main Methods:

• Retrospective analysis of 118 patients undergoing resection of CRC liver metastases (1992-2004).
• Patients categorized into three groups: MOR < 1 cm, MOR > 1 cm, and re-MOR > 1 cm.
• Comparison of recurrence rates and survival between groups.

Main Results:

• Patients with MOR > 1 cm showed significantly decreased liver and distant recurrence compared to re-MOR > 1 cm (p < 0.05).
• Disease-free survival was improved in the MOR > 1 cm group (39.2 months) versus re-MOR > 1 cm (22.9 months, p = 0.023).
• No significant difference in overall survival was observed between groups (p = 0.14).

Conclusions:

• Intraoperative margin re-resection is associated with an increased risk of local and distant recurrence.
• This finding may indicate inadequate surgical technique or reflect underlying tumor biology.
• Achieving wider resection margins appears beneficial for reducing recurrence in CRC liver metastases.