Clinical Scorecard: Evaluation of Surgical Outcomes in Robotic Complete Mesocolic Excision for Right-Sided Colon Cancer: A Comparison Between Obese and Non-Obese Patients

At a Glance

Key Highlights

• Robotic CME is a technically demanding but standardized oncologic surgery for right-sided colon cancer involving dissection along embryological planes and central lymphadenectomy.
• Obesity poses challenges due to abundant visceral fat complicating vascular and anatomic landmark identification, raising concerns about safety and outcomes.
• Robotic surgery offers advantages facilitating minimally invasive CME in obese patients, with comparable short-term perioperative and oncologic outcomes to non-obese patients.

Guideline-Based Recommendations

Diagnosis

• Right-sided colon cancer defined by tumor location in cecum, ascending colon, hepatic flexure, or proximal third of transverse colon.
• Exclude emergency surgery cases, stage IV disease, and synchronous multiple colorectal cancers for elective robotic CME.

Management

• Perform robotic CME with SMV-first approach and central lymphadenectomy as standard for all right-sided colon cancers regardless of T stage.
• Choice of intracorporeal versus extracorporeal anastomosis at surgeon’s discretion.
• Experienced fellowship-trained colorectal surgical oncologists should perform procedures.

Monitoring & Follow-up

• Collect and grade complications within 30 days post-surgery using Clavien-Dindo classification; major complications defined as grade III or higher.
• Pathological assessment including histological grade, TNM staging, lymph node harvest and positivity, and circumferential resection margin status.
• Follow-up to capture recurrence and survival outcomes, with at least 3 years to detect majority of recurrences.

Risks

• Increased technical difficulty and risk of vascular injury in obese patients due to visceral fat.
• Potential for conversion to open surgery if minimally invasive approach is not feasible.

Patient & Prescribing Data

Patients undergoing robotic CME for right-sided colon cancer, stratified by obesity status.

Robotic CME in obese patients yields perioperative safety and oncologic outcomes comparable to non-obese patients, supporting its use regardless of BMI.

Clinical Best Practices

• Standardize robotic CME technique with SMV-first approach and central lymphadenectomy for right-sided colon cancer.
• Ensure surgeon expertise with fellowship training in colorectal surgical oncology and robotic platforms.
• Use rigorous perioperative complication grading and pathological assessment to monitor outcomes.
• Consider sex-stratified analyses and sensitivity analyses excluding complex cases to refine outcome interpretation.
• Maintain adequate follow-up duration (≥3 years) to assess recurrence and survival.

References

• Global colon cancer incidence
• Standardized surgical approaches and prognosis
• Robotic surgery advantages in colorectal cancer
• Clavien-Dindo classification for surgical complications
• Colorectal cancer recurrence timing
• SMV-first approach to robotic CME
• STROCSS reporting guidelines