Conversions in laparoscopic surgery for rectal cancer

Area of Science:

• Colorectal Surgery
• Surgical Oncology
• Minimally Invasive Surgery

Background:

• Laparoscopic surgery for rectal cancer offers benefits over open surgery.
• Patient selection is crucial to avoid intraoperative conversion.
• The COLOR II trial investigated factors influencing conversion rates.

Purpose of the Study:

• Identify clinical and pathological predictors of conversion from laparoscopic to open surgery in rectal cancer patients.
• Improve patient selection criteria for laparoscopic rectal cancer surgery.
• Analyze outcomes associated with converted procedures.

Main Methods:

• Multivariate analyses were used to identify predictive factors for conversion.
• 1044 patients with rectal cancer were randomized in the COLOR II trial.
• 114 out of 693 laparoscopic cases were converted to open surgery.

Main Results:

• Age over 65 (OR 1.9), BMI over 25 (OR 2.7), and tumor location >5cm from anal verge (OR 0.5) correlated with conversion.
• Converted surgeries had increased blood loss and longer operating times.
• Converted procedures resulted in more postoperative complications.

Conclusions:

• Age >65, BMI >25, and tumor location 5-15cm from the anal verge are risk factors for conversion.
• Optimizing patient selection can reduce conversion rates.
• Understanding these factors improves the safety and efficacy of laparoscopic rectal cancer surgery.