Radical surgery for early gastric cancer

Area of Science:

• Oncology
• Surgical Oncology
• Gastroenterology

Background:

• The efficacy of radical surgery (D2 lymph-node dissection) for early gastric cancer is debated, influenced by recent trial results and concerns over complications.
• Recent prospective randomized trials suggest no significant benefit of D2 over D1 resections, leading to a shift away from radical lymph-node dissection.
• This shift may stem from high complication rates associated with distal pancreatectomy and splenectomy, rather than a lack of D2 efficacy.

Purpose of the Study:

• To re-evaluate the role and necessity of radical D2 lymph-node dissection in early gastric cancer surgery.
• To address the perceived flaws in recent trial interpretations regarding D2 resection efficacy.
• To advocate for the continued use of radical surgery by proposing methods to reduce its associated morbidity and mortality.

Main Methods:

• Review and critical analysis of existing prospective randomized trials and retrospective data on D1 versus D2 lymph-node dissection for early gastric cancer.
• Examination of the causes of post-operative complications in radical gastric cancer surgery, particularly distal pancreatectomy and splenectomy.
• Proposal of strategies to mitigate surgical risks, including organ preservation and centralization of procedures in specialized centers.

Main Results:

• Post-operative complications in D2 resections are often linked to specific procedures (distal pancreatectomy, splenectomy) and surgeon experience, not inherent to the radical dissection itself.
• Lymph-node metastasis to N2 nodes occurs in up to 23% of early gastric cancer cases, highlighting the risk of residual disease with non-radical surgery.
• Centralization of surgery in expert centers and organ-preserving techniques can significantly reduce complication rates, making radical surgery safer.

Conclusions:

• The perceived lack of benefit from D2 resection is a misinterpretation; the focus should be on reducing surgical morbidity, not abandoning an effective oncological principle.
• Radical D2 lymph-node dissection should remain the standard of care for early gastric cancer to prevent residual disease and ensure curative treatment.
• Implementing organ-preserving techniques and concentrating surgical expertise in specialized centers are key to improving the safety and efficacy of radical gastric cancer surgery.