This study aims to clarify the safety concerns surrounding laparoscopic right-sided colectomy for colon cancer, which has unexpectedly high complication rates.

• Right hemicolectomy shows a fourfold higher mortality risk than low anterior resection in Japan, despite being less complex.
• The study plans to analyze over 2,000 cases from 73 facilities, focusing on severe postoperative complications and intraoperative vascular injuries.

Understanding these risks is crucial for improving surgical safety and effectiveness in patient selection for right-sided colectomy.

• Comprehensive data collection will provide evidence-based insights for enhancing surgical practices both in Japan and globally.