Clinical Scorecard: Optimizing the Surgical Field for Right-Sided Colon Cancer Mobilization via a Duodenum-First Multidirectional Technique in Laparoscopic Procedures

At a Glance

Key Highlights

• DMA combines advantages of medial-to-lateral, lateral-to-medial, cranial-to-caudal, and retroperitoneal approaches for right colectomy.
• DMA begins dissection by cutting the peritoneum along the root of the mesentery above the horizontal duodenum, facilitating a wide surgical field and safe mobilization.
• DMA demonstrated feasibility and safety compared to conventional medial approach, with improved surgical field optimization and reproducibility.

Guideline-Based Recommendations

Diagnosis

• Preoperative assessment of tumor invasion depth to determine lymph node dissection extent as per Japanese Guidelines for the Treatment of Colorectal Cancer.

Management

• Perform laparoscopic right colectomy with CME and CVL to reduce local recurrence and improve oncological outcomes.
• Use DMA technique involving three-step multidirectional dissection starting at the duodenum to optimize surgical field and facilitate safe mobilization.
• Maintain partial lateral attachment of the cecum to preserve ileocecal vessel position before CVL.

Monitoring & Follow-up

• Evaluate intraoperative parameters including total operative time, mobilization time, and assistant hand movements to optimize surgical field.
• Monitor postoperative complications within 30 days using Clavien–Dindo classification.

Risks

• Anatomical complexity around pancreas and duodenum increases technical difficulty and risk of injury during medial-to-lateral approach.
• Potential for vessel distortion if lateral cecal attachments are fully released before CVL.

Patient & Prescribing Data

120 patients undergoing laparoscopic right-sided colon cancer surgery at a single center between 2013 and 2019.

DMA was introduced after initial use of conventional medial and caudal-first multidirectional approaches, showing improved reproducibility and safety in mobilization.

Clinical Best Practices

• Use five-port laparoscopic setup with patient in Trendelenburg position and left side down to optimize small bowel displacement.
• Assistant retracts mesentery like a fan above the horizontal duodenum to maintain wide surgical field during DMA.
• Dissect above ventral layer of duodenum and pancreas, preserving anterior pancreatic fascia and Toldt’s fusion fascia to maintain correct dissection plane.
• Use gauze to gently lift small bowel mesentery to avoid injury and maintain exposure.
• Identify and divide accessory right colic vein (superior right colic vein) early to facilitate mobilization.
• Leave lateral cecal attachments partially intact until after CVL to preserve vascular anatomy.

References

• Japanese Guidelines for the Treatment of Colorectal Cancer
• Clavien–Dindo Classification of Surgical Complications