How can I explain a hyperplastic gastric polyp, its cause (Helicobacter pylori infection), prognosis, and treatment options (including eradication therapy and endoscopic removal if indicated) to a patient?

Explaining Hyperplastic Gastric Polyps to Patients

A hyperplastic gastric polyp is a benign (non-cancerous) growth in your stomach lining that often develops in response to chronic inflammation, most commonly caused by a bacterial infection called Helicobacter pylori (H. pylori). 1

What Are Hyperplastic Polyps?

Hyperplastic polyps are smooth, dome-shaped growths that appear red with whitish coating on their surface. They account for 18-70% of all stomach polyps and are usually:

• Single or few in number (not multiple like some other polyp types)
• Small in size (typically 0.5-1.5 cm)
• Located in the lower stomach (antrum) or near ulcers or surgical sites 1

What Causes Them?

The primary cause is chronic stomach inflammation, with H. pylori infection present in about 25% of cases. The bacteria create ongoing irritation that triggers the stomach lining to overgrow, forming these polyps 1. They can also develop near ulcers, after stomach surgery, or in areas of chronic gastritis.

What Is the Prognosis?

The good news: Most hyperplastic polyps are benign and have an excellent prognosis, especially when H. pylori is treated. 1

However, you should understand these important points:

• Small polyps (<1 cm): Very low cancer risk (1.9-19% may show abnormal cells called dysplasia) 1
• Larger polyps (>1 cm): Higher risk of containing abnormal or cancerous cells, particularly in patients who've had stomach surgery 1
• Surrounding stomach tissue: About 6% of patients with dysplastic hyperplastic polyps may have other abnormal areas in the stomach 1

Treatment Options: A Stepwise Approach

Step 1: Test and Treat H. pylori Infection FIRST

If you have H. pylori infection, eradication therapy should be your first treatment—not immediate polyp removal. 1 This is critical because:

• Up to 70-85% of hyperplastic polyps completely disappear after successful H. pylori eradication 1, 2, 3, 4
• Polyp regression typically occurs within 3-15 months (average 7 months) after treatment 2
• This approach avoids unnecessary procedures 1

H. pylori eradication therapy consists of antibiotics (typically two antibiotics like amoxicillin and clarithromycin) plus a proton pump inhibitor for 14 days 5. Success must be confirmed with a test 4+ weeks after treatment 5.

Step 2: Repeat Endoscopy After H. pylori Treatment

Wait 3-6 months after H. pylori eradication, then undergo repeat endoscopy to see if the polyps have disappeared 1.

Step 3: Endoscopic Removal (If Needed)

Polyps should be completely removed if they:

• Are >1 cm in size 1
• Have a pedunculated (stalk-like) shape 1
• Cause symptoms (bleeding, obstruction) 1
• Are >3 cm (always remove regardless of H. pylori status due to high cancer risk) 1
• Persist after H. pylori eradication 1

Step 4: Surveillance

You will need ongoing endoscopic surveillance if:

• The polyp showed dysplasia (abnormal cells) 1
• Your stomach lining shows gastric atrophy or intestinal metaplasia (precancerous changes) 1, 6
• The polyp was incompletely removed 6

Surveillance intervals:

• Low-grade dysplasia: Follow-up in 6 months if incompletely removed, 1 year if completely removed 6
• High-grade dysplasia: Follow-up in 3 months if incompletely removed, 6 months if completely removed 6

Common Pitfalls to Avoid

1. Don't rush to polyp removal: Always test for H. pylori first, as most polyps will disappear with eradication therapy alone 1, 2, 3
2. Don't skip the test of cure: Confirm H. pylori eradication was successful before assuming treatment worked 5
3. Don't ignore the surrounding stomach: Your doctor should biopsy other areas of your stomach to check for gastric atrophy, intestinal metaplasia, or other abnormalities 1, 7

Key Takeaway

Your treatment plan should follow this algorithm:

1. Test for H. pylori → If positive, treat with antibiotics
2. Confirm eradication → Test 4+ weeks after treatment
3. Repeat endoscopy → 3-6 months after eradication
4. Remove polyp only if → >1 cm, symptomatic, >3 cm, or persistent after H. pylori treatment
5. Surveillance → Based on polyp histology and surrounding stomach tissue findings

This approach maximizes the chance your polyps will disappear naturally while minimizing unnecessary procedures and ensuring any cancer risk is properly monitored.