Why is proximal gastrectomy not commonly performed as a surgical treatment for gastric cancer?

Why Proximal Gastrectomy Is Not Commonly Performed

Proximal gastrectomy is not commonly performed because it is restricted to early gastric cancer (cT1cN0) only, while the standard surgical procedure for clinically node-positive or T2-T4a tumors is either total or distal gastrectomy. 1

Strict Oncologic Limitations

The primary reason proximal gastrectomy remains uncommon is its narrow indication window:

• For advanced disease (cT2-T4a or node-positive tumors), total gastrectomy is the standard surgical procedure, and proximal gastrectomy is explicitly not advised 1
• Proximal gastrectomy is only recommended for early gastric cancer (cT1cN0) located in the upper third when more than half of the distal stomach can be preserved 1
• This represents a small subset of gastric cancer patients, as most cases in Western countries are diagnosed at advanced stages 1, 2

Technical and Functional Challenges

Even when oncologically appropriate, proximal gastrectomy faces significant technical obstacles:

• High incidence of postoperative reflux esophagitis (20-65%) after traditional proximal gastrectomy reconstruction methods 3, 4
• Frequent anastomotic stenosis complications 4, 5
• Residual food retention issues 4
• No standardized reconstruction method has been established, with multiple competing techniques (esophagogastrostomy, double-tract reconstruction, jejunal interposition) each having distinct advantages and disadvantages 4, 6

Inadequate Lymphadenectomy Concerns

Proximal gastrectomy provides less extensive lymph node dissection compared to total gastrectomy:

• D1+ lymphadenectomy for proximal gastrectomy includes only stations 1,2, 3a, 4sa, 4sb, 7, 8a, 9, and 11p 1
• This is insufficient for advanced disease where D2 lymphadenectomy is required for potentially curable T2-T4 tumors 1
• When pancreatic invasion requires pancreatectomy, total gastrectomy is mandatory regardless of tumor location 1

Specific Situations Mandating Total Gastrectomy

Several clinical scenarios absolutely require total gastrectomy over proximal gastrectomy:

• Tumors along the greater curvature with metastasis to No. 4sb lymph nodes require total gastrectomy with splenectomy, even if the primary tumor could theoretically be removed by distal gastrectomy 1
• Any pancreatic invasion necessitating pancreatectomy 1
• Inability to achieve adequate resection margins (3 cm for T2+ expansive tumors, 5 cm for infiltrative patterns) 1

Geographic Practice Variations

Western countries predominantly use total gastrectomy despite Asian guideline recommendations for proximal gastrectomy in selected cases:

• Japanese Gastric Cancer Association recommends proximal gastrectomy with D1+ lymphadenectomy for early gastric tumors 7
• Western surgical practice still relies heavily on total gastrectomy due to technical and oncological concerns 7
• This divergence reflects different screening practices—Japan and South Korea have population-based screening programs that detect more early-stage disease amenable to proximal gastrectomy 1, 2

Emerging Evidence and Future Directions

Recent studies suggest proximal gastrectomy may have functional advantages when appropriately selected:

• Preserving the distal stomach diminishes dumping syndrome and anemia incidence 7
• Improved postoperative quality of life compared to total gastrectomy 7, 3
• Meta-analysis shows proximal gastrectomy has superior operation time, less blood loss, and better long-term nutritional status for early gastric cancer 5
• However, overall survival between proximal and total gastrectomy groups shows no significant difference 5

Critical Pitfalls to Avoid

• Never perform proximal gastrectomy for node-positive disease or T2-T4a tumors—this violates established oncologic principles 1
• Always ensure frozen section examination of the proximal resection margin when adequate margins cannot be achieved 1
• Do not assume proximal gastrectomy is appropriate simply because the tumor is in the upper third—nodal status and T stage are determining factors 1
• Recognize that anti-reflux reconstruction techniques (double-flap technique, double-tract reconstruction) are essential to reduce postoperative complications when proximal gastrectomy is performed 3, 5