Surgical Management of Gastric Carcinoma

For resectable gastric cancer, perform either distal or total gastrectomy with D2 lymphadenectomy as the standard curative approach, selecting the procedure based on tumor location and ensuring adequate resection margins. 1

Type of Gastrectomy Selection

Distal Gastrectomy

Indicated for distal gastric tumors when adequate proximal margins can be achieved:

Requires 3 cm proximal margin for T2+ tumors with expansive growth (Types 1 and 2) 2, 1
Requires 5 cm proximal margin for infiltrative growth patterns (Types 3 and 4) and diffuse Lauren histotype 3
For T1 tumors, a 2 cm gross margin is sufficient 1
When margins are uncertain, perform frozen section examination intraoperatively 2, 1

Total Gastrectomy

Mandatory in these specific situations:

Proximal tumors where adequate distal stomach preservation is impossible 2, 1
Pancreatic invasion requiring pancreatectomy, regardless of tumor location 1
Tumors along the greater curvature of the corpus or fundus without adequate surgical margins 3
Tumors with metastasis to station 4sb lymph nodes along the greater curvature, even if technically removable by distal gastrectomy 1

Function-Preserving Options (Early Cancer Only)

For cT1cN0 tumors, consider modified procedures:

Pylorus-preserving gastrectomy: Middle stomach tumors with distal border ≥4 cm proximal to pylorus 2
Proximal gastrectomy: Proximal tumors where >50% of distal stomach can be preserved 2
These remain investigational for more advanced stages 1

Lymphadenectomy Extent

D2 Lymphadenectomy (Standard)

Indicated for all potentially curable T2-T4 tumors and cT1N+ tumors 2, 1:

For Distal Gastrectomy D2:

Stations 1,3, 4sb, 4d, 5,6,7, 8a, 9, 11p, 12a 2

For Total Gastrectomy D2:

Stations 1-7, 8a, 9,10, 11p, 11d, 12a 2

D1+ Lymphadenectomy

Indicated for cT1N0 tumors (except very early cancers):

D1 nodes plus stations 8a and 9 2

D1 Lymphadenectomy

Only for T1a tumors not meeting endoscopic resection criteria, or cT1bN0 differentiated tumors ≤1.5 cm 2, 1

Critical Anatomical Considerations

Splenectomy Decision

Spleen preservation is now standard based on JCOG0110 trial demonstrating noninferiority 3:

Perform splenectomy only when:
- Tumors located along greater curvature with macroscopic involvement of stations 4sa or 10 3
- Direct tumor invasion of spleen 3
Routine prophylactic splenectomy increases complications without survival benefit 3

Pancreas Preservation

Distal pancreas should NOT be routinely removed 4:

Remove only with direct tumor invasion in proximal gastric cancers 4
Pancreaticosplenectomy for distal two-thirds tumors shows no benefit 4

Omentectomy

Greater omentum removal is standard for T3+ tumors 3:

For T1/T2 tumors, preserve omentum >3 cm from gastroepiploic arcade 3
Bursectomy may benefit T3+ tumors with posterior wall involvement but avoid in T1/T2 to prevent pancreatic injury 3

Reconstruction Techniques

After Distal Gastrectomy

Roux-en-Y reconstruction is preferred over Billroth I/II for superior functional outcomes and reduced bile reflux 3:

Billroth II acceptable for tumors invading pylorus/duodenum (allows re-operation if recurrence) 5
Pouch reconstruction may improve quality of life but requires technical expertise 6

After Total Gastrectomy

Roux-en-Y esophagojejunostomy is standard 3:

Simplest technique with satisfactory functional results 3
Jejunal pouch construction may improve nutritional outcomes 6

After Proximal Gastrectomy

Modified tubular gastroesophageal anastomosis or jejunal interposition reduces severe reflux compared to simple esophagogastrostomy 5

Minimally Invasive Approaches

Laparoscopic Surgery

Established as equivalent to open surgery for:

cT1N0 and cT1N1 distal gastrectomy with D2 lymphadenectomy 5, 7
Provides faster recovery with equivalent oncological outcomes 5, 8

For advanced gastric cancer:

Perform only in high-volume experienced centers 5
Long-term survival data from ongoing trials pending 5

Robotic Surgery

Emerging technique showing promise for enhanced lymphadenectomy precision 6, 8:

Preliminary data suggest potential advantages in early postoperative recovery 6
Requires further validation studies 6

Extended Resections

Combined Organ Resection

Perform en bloc resection of directly invaded adjacent organs when R0 resection achievable 1:

Liver, colon, diaphragm as needed
Avoid non-curative extended resections 1

Para-aortic Lymphadenectomy

Not routinely recommended - JCOG9501 trial showed no survival benefit 1:

Consider only in clinical trials for selected patients 5

Station 14v Dissection

Consider for clinically stage III middle/lower third tumors with extensive nodal disease, particularly infrapyloric metastases 5:

Not part of routine D2 dissection 5

Common Pitfalls to Avoid

Inadequate margins: Always verify with frozen section if macroscopic margins questionable - positive margins dramatically worsen prognosis 1
Incomplete D2 lymphadenectomy: Minimum 15 lymph nodes required for accurate staging; incomplete dissection causes stage migration 4
Routine splenectomy: Outdated practice that increases morbidity without benefit 3
Inadequate preoperative marking: Use endoscopic clips for unclear tumor borders, especially in infiltrative types 1
Inappropriate function-preserving surgery: Reserve for confirmed early cancer only; understaging leads to inadequate treatment 1

Special Populations

Esophagogastric Junction Tumors

For adenocarcinoma proximal to EGJ: Consider esophagectomy with proximal gastrectomy and gastric tube reconstruction, similar to esophageal cancer approach 2, 1

Hereditary Gastric Cancer (CDH1 mutations)

Prophylactic total gastrectomy is recommended for pathogenic CDH1 mutation carriers 8

Oligometastatic Disease

Reduction surgery (gastrectomy for metastatic disease) is NOT recommended - REGATTA trial (JCOG0705) showed no survival benefit 1:

Surgery only for palliation of bleeding/obstruction 1

What are the surgical management options for gastric carcinoma, including procedures, anatomical considerations, and reconstruction techniques?

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