How should gastric adenopathy be evaluated and managed?

Gastric Adenopathy: Evaluation and Management

I believe you're asking about gastric adenomas (not "adenopathy," which refers to lymph nodes). All gastric adenomas should be completely resected when clinically appropriate and safe to do so, as they carry significant risk of progression to gastric cancer 1.

Initial Endoscopic Evaluation

When gastric polyps are identified, perform systematic documentation:

• Document the number (or estimated number), location, and size of the largest polyp 1
• Obtain photographic documentation of all polyps or representative polyps if numerous 1
• Use enhanced imaging (NBI, FICE, i-Scan, or chromoendoscopy) when diagnostic uncertainty exists after white-light examination 1, 2

All gastric polyps except fundic gland polyps (FGPs) must be biopsied for histopathological assessment 1. This is critical because gastric adenomas appear endoscopically as velvety pink lobulated lesions, typically single, small (<2 cm), and located in the antrum/incisura angularis 1.

Assessment of Background Mucosa

When adenomas are present, the background gastric mucosa must be carefully evaluated for:

• Gastric atrophy (GA)
• Gastric intestinal metaplasia (GIM)
• Helicobacter pylori infection
• Synchronous neoplasia 1

This is crucial because up to 30% of patients with gastric adenomas have coexisting synchronous gastric adenocarcinoma 1. Additionally, adenomas are typically associated with background GA and GIM 1.

Management Algorithm for Gastric Adenomas

1. Resection Strategy

All gastric adenomas should be resected endoscopically 1. The technique depends on size:

• Lesions ≤15 mm: Endoscopic mucosal resection (EMR) can achieve en bloc excision 1
• Lesions >15 mm: Endoscopic submucosal dissection (ESD) is advisable as sessile polyps of this size have high possibility of invasive neoplasia, and ESD reduces recurrence risk compared to EMR 1

The rationale is compelling: 50% of adenomatous polyps >2 cm contain foci of adenocarcinoma 1.

2. H. pylori Management

All patients with gastric adenomas should be tested and treated for H. pylori if positive 2. This should be done as part of the comprehensive evaluation.

3. Surveillance Protocol

After complete endoscopic excision of adenomas:

• First follow-up gastroscopy at 12 months 1
• Then annual surveillance gastroscopy thereafter when appropriate 1

The surveillance interval should also be determined by the stage of chronic atrophic gastritis (CAG) in the background mucosa 1.

Critical Pitfalls to Avoid

1. Don't assume all gastric polyps are benign: Different polyp types can coexist in the same patient 2, and adenomas specifically carry malignant potential

2. Don't neglect the background mucosa: The surrounding gastric mucosa often harbors atrophic gastritis and intestinal metaplasia 3, which independently increases gastric cancer risk and requires its own surveillance strategy 2

3. Don't perform inadequate biopsies: When biopsying suspected adenomas, obtain multiple (5-8) biopsies to provide adequately sized material for accurate histological interpretation 4

4. Don't delay resection: Unlike hyperplastic polyps (which may regress with H. pylori eradication), adenomas require definitive resection due to their neoplastic nature 1, 5

Special Considerations

The British Society of Gastroenterology guidelines emphasize that gastric adenomas carry a significant risk of progression to cancer 1. This is not a "watch and wait" scenario—these are premalignant lesions requiring intervention to prevent mortality from gastric adenocarcinoma.

If dysplasia is confirmed in the resected adenoma:

• Low-grade dysplasia: 1-year follow-up if completely resected; 6 months if incompletely resected 2
• High-grade dysplasia: 6-month follow-up if completely resected; 3 months if incompletely resected 2

The aggressive surveillance reflects the high stakes: these patients have demonstrated capacity for neoplastic transformation and require close monitoring for metachronous lesions.