Laparoscopic segmental colectomy with extensive D3 lymph node dissection for right transverse colon cancer

Area of Science:

• Surgical Oncology
• Gastrointestinal Surgery
• Colorectal Cancer Research

Background:

• Right-sided transverse colon cancer (TCC) presents unique surgical challenges.
• Standard D3 lymph node dissection (D3LND) is crucial for accurate staging and treatment.
• Novel techniques are being explored to optimize oncological outcomes in TCC surgery.

Purpose of the Study:

• To evaluate the efficacy of laparoscopic segmental colectomy with extensive D3 lymph node dissection (ED3LND) versus standard D3LND for right-sided TCC.
• To compare surgical, pathological, and oncological outcomes between the two techniques.

Main Methods:

• A randomized trial involving 42 patients with right-sided TCC.
• Patients were assigned to either segmental colectomy with D3LND (Group 1) or segmental colectomy with ED3LND (Group 2).
• Retrospective comparison of clinical, surgical, pathological, and oncological outcomes.

Main Results:

• ED3LND group (Group 2) showed significantly higher numbers of retrieved lymph nodes and apical lymph nodes, with fewer apical lymph node metastases compared to D3LND group (Group 1).
• No significant differences were found in operation time, hospital stay, blood loss, overall lymph node metastases, or major postoperative complications.
• 3-year disease-free survival rates were comparable: 82.6% for Group 1 and 84.2% for Group 2.

Conclusions:

• Laparoscopic segmental colectomy with ED3LND may provide superior oncological clearance for right-sided TCC compared to standard D3LND.
• The findings suggest potential oncological benefits of ED3LND, warranting further investigation.
• A large-scale prospective randomized controlled study is recommended to validate these preliminary findings.