Why Expert Endoscopy Matters More Than Many Patients Realize

Gastric polyps are growths that develop in the lining of the stomach. Many are benign, but some carry a risk of progression to cancer (dysplasia), early stomach cancer, depending on their type, size, and the condition of the surrounding stomach lining.

Because early stomach cancer is often subtle and easy to miss, the quality of the endoscopy matters greatly. Detection depends not only on the scope itself, but also on advanced imaging, the endoscopist’s experience, and whether suspicious lesions are completely removed rather than only sampled.
The American Gastroenterological Association (AGA) recently released updated clinical practice advice on the management of gastric polyps. The expert panel and authors included specialists from the University of Pennsylvania, Stanford University, Moffitt Cancer Center, and Baylor College of Medicine.

One critical issue patients should understand is this:

Early-stage stomach cancer can be missed, even during endoscopy, if the examination is not performed with advanced technology and expert-level skill.
This is why where and how your endoscopy is performed can have a major impact on diagnosis and outcomes.
At centers like Bumrungrad International Hospital, advanced imaging technologies and subspecialty expertise help improve the detection, characterization, and complete removal of concerning gastric lesions.
 
 

Why Gastric Cancer Is Often Diagnosed Late

According to recent global oncology data presented at the American Society of Clinical Oncology (ASCO) 2026:

• Gastric cancer remains among the leading causes of cancer-related death worldwide
• More than 60% to 70% of cases are diagnosed at advanced stages
• Early gastric cancer has a survival rate of more than 90%, but outcomes drop sharply once the disease is found late

 

Why is early detection so difficult?

• Subtle lesions
  Early cancers may appear flat, slightly depressed, or otherwise easy to overlook.
• Inadequate imaging
  Standard-definition scopes may miss fine mucosal changes.
• Operator dependency
  Detection rates vary significantly based on the skill, training, and attention to detail of the endoscopist.
• Incomplete resection
  Some physicians take only a biopsy and leave the lesion in place rather than removing it completely.

 
 

Key Message for Patients

Not all endoscopies are equal.
Missing an early cancer or incompletely removing a lesion can delay diagnosis and worsen outcomes.
 
What Are Gastric Polyps?
Gastric polyps are broadly classified into several types, and each type carries a different level of clinical significance and cancer risk.
 
Table 1: Types of Gastric Polyps and Their Clinical Significance
 

Polyp Type	Typical Cause	Cancer Risk	Key Clinical Significance
Fundic gland polyps	Proton pump inhibitor use, sporadic	Very low	Usually benign; biopsy may be considered if atypical
Hyperplastic polyps	Chronic inflammation, Helicobacter pylori	Low–moderate	Can harbor dysplasia; removal is often recommended if large
Adenomas	Intestinal metaplasia	High	Precancerous and require complete removal
Neuroendocrine tumors	Gastrin-related conditions	Variable	Requires staging and surveillance
Hamartomatous polyps	Genetic syndromes	Variable	May be associated with broader systemic syndromes

 
Most gastric polyps do not cause symptoms and are often found during endoscopy for another reason. However, depending on the size, type, or location, some lesions may be associated with bleeding, anemia, discomfort, or obstruction.
 
How Gastric Polyps and Early Stomach Cancer Look During Endoscopy
Recognizing the appearance of different gastric lesions requires experience.

Typical endoscopic appearance

• Fundic gland polyps
  Smooth, glassy, pale nodules
• Hyperplastic polyps
  Reddish, inflamed, often lobulated
• Adenomas
  Flat or slightly elevated with an irregular surface
• Early gastric cancer
  Subtle depression, discoloration, or an irregular vascular pattern

 
Why expertise matters
To an untrained eye, these lesions may appear very similar.
Experienced endoscopists use advanced imaging to identify microsurface and microvascular abnormalities that can signal early cancer. This is one reason why expert gastroscopy is so important in patients with gastric polyps or suspicious gastric lesions.
 

Advanced Endoscopy Technology for Detecting Gastric Polyps and Early Cancer

A modern, high-quality gastroscopy should include the following:

1. High-Definition White Light Endoscopy (HD-WLE)

• Standard foundation for visual examination
• Provides detailed structural visualization of the stomach lining

2. Image-Enhanced Endoscopy (IEE)
This may include:

• Narrow Band Imaging (NBI)
• Blue Light Imaging (BLI)
• Linked Color Imaging (LCI)

These technologies help enhance:

• Vascular patterns
• Surface architecture
• Early cancer detection

 

Why technology alone is not enough

Even with the best equipment, detection still depends heavily on the endoscopist’s training, experience, and careful inspection technique. Advanced tools improve visibility, but they do not replace expertise.
 
 

Complete Removal vs Biopsy: Why the Difference Matters

Many patients are unaware that in some cases, a physician may take only a biopsy, while the lesion itself remains in place.
Risks of incomplete management

• Missed cancer progression
• Need for repeat procedures
• Delayed definitive treatment

 

Best practice

According to AGA best practice advice, whenever feasible, concerning gastric lesions should be completely removed, not just sampled.
This distinction is important because a biopsy may not fully reflect the most advanced part of a lesion. In selected cases, complete endoscopic removal offers a better chance for accurate diagnosis and proper treatment.
 

Approach to Gastric Polyps

A simplified clinical approach includes:
Step 1: Detection
Identify the lesion during gastroscopy
Step 2: Characterization using HD + IEE
Assess surface pattern, vascular pattern, size, and morphology
Step 3: Risk stratification

• Benign lesions: Observe or biopsy
• Suspicious lesions: Resect

Step 4: Complete endoscopic removal, if indicated
Step 5: Histopathology confirmation
Step 6: Surveillance planning
This stepwise approach helps reduce the risk of missed cancer and supports more personalized follow-up planning.
 
 

American Gastroenterological Association (AGA) 2026 Best Practice Advice

1. Not all polyps need removal
Small, benign-appearing polyps may be monitored.
2. Larger or suspicious lesions should be removed
This is especially important for:

• Adenomas
• Polyps larger than 5 to 10 mm
• Lesions with irregular features

3. Helicobacter pylori must be treated
This infection is strongly associated with:

• Hyperplastic polyps
• Gastric cancer

4. The background stomach condition matters
Atrophy or intestinal metaplasia increases the risk of gastric cancer.
5. Surveillance should be individualized
Follow-up depends on:

• Polyp type
• Size
• Histology

These recommendations reflect an important principle: management of gastric polyps is not one-size-fits-all. It must be tailored to the lesion and the patient’s underlying stomach cancer risk.
 

Surveillance Recommendations for Gastric Polyps

 

Condition	Recommended Follow-Up
Fundic gland polyps (low risk)	No routine follow-up
Hyperplastic polyps	Repeat endoscopy if large or dysplastic
Adenomas	Close surveillance after removal
Neuroendocrine tumors	Regular interval surveillance
High-risk stomach (atrophy/metaplasia)	Periodic surveillance

 
Because surveillance intervals vary by risk profile, patients should follow an individualized plan based on physician assessment and pathology results.
 

The Hidden Risk of Missed Early Gastric Cancer

Patients should be aware that early gastric cancer may be:

• Flat
• Pale
• Nearly invisible

Without advanced imaging and expert examination:

• Lesions can be missed
• Cancer may progress silently

This is one of the most important reasons why careful inspection, lesion recognition, and appropriate endoscopic removal are so critical

 

Why Choose Bumrungrad International Hospital for Gastric Polyps and Early Stomach Cancer Detection

1. Advanced imaging technology

• High-definition scopes
• Full image-enhanced endoscopy capabilities, including NBI, BLI, and LCI

2. Subspecialty expertise
Advanced endoscopists trained internationally, with expertise in:

• Early cancer detection
• Endoscopic resection, including:
  • Endoscopic mucosal resection (EMR)
  • Endoscopic submucosal dissection (ESD)
  • Endoscopic full-thickness resection (EFTR)

3. Complete treatment in one setting

• Diagnosis and removal in the same session, when appropriate
• Reduced delays and fewer repeat procedures

4. Multidisciplinary care
Care may involve collaboration among:

• Gastroenterologists
• Pathologists
• Oncologists
• Surgical oncologists
• Medical genetics specialists

5. Proven outcomes

• Higher detection rates of early lesions
• Safer and more complete resections

At Bumrungrad, the combination of advanced endoscopy technology, subspecialty experience, and coordinated multidisciplinary care helps ensure that suspicious gastric lesions are evaluated thoroughly and treated appropriately. The appropriate center to mention here is the Digestive Disease Center at Bumrungrad International Hospital.
 

Key Takeaways

• Gastric polyps are common, but they are not always harmless
• Some gastric polyps carry a risk of dysplasia or stomach cancer
• Early gastric cancer is highly curable, but it is often missed if the exam is not done carefully
• Advanced imaging and expert endoscopist improve detection
• Complete removal is often better than biopsy alone for concerning lesions
• Surveillance should be personalized based on polyp type, size, and histology

 

Final Message

Choosing the right center for endoscopy is not simply a matter of convenience. In some cases, it can be life-saving.
At institutions like Bumrungrad International Hospital, the combination of cutting-edge imaging, experienced endoscopists, and comprehensive care helps ensure that gastric polyps and early stomach cancer are not missed and are treated properly the first time.
 
Tossapol Kerdsirichairat, MD, FACG, FASGE
Clinical Associate Professor of Medicine
Advanced/Bariatric Endoscopy, Digestive Disease Center
Bumrungrad International Hospital