Upper Endoscopy With Biopsy
Directly examines the stomach and duodenum, identifies ulcers, inflammation, bleeding, narrowing, polyps, or masses, and allows biopsy or treatment.
Best for: Bleeding, anemia, persistent vomiting, weight loss, progressive symptoms, suspected obstruction, or need for tissue diagnosis
Limitations: Requires fasting, sedation or anesthesia planning, and procedural risk review
Takeaway: Best test when direct visualization or biopsy can change management
Noninvasive H. pylori Testing
Breath or stool testing can identify active infection in selected patients and can confirm eradication after treatment.
Best for: Appropriate dyspepsia or ulcer pathways without an immediate need for endoscopy
Limitations: Results can be affected by acid suppression, antibiotics, bismuth, and test timing
Takeaway: Use with correct preparation and interpret within the clinical context
Imaging
CT, ultrasound, contrast studies, or other imaging may identify perforation, obstruction, wall thickening, a mass, or disease outside the stomach and duodenum.
Best for: Severe pain, vomiting, suspected obstruction, complications, or an alternative abdominal diagnosis
Limitations: Cannot replace mucosal biopsy or identify all ulcers and gastritis
Takeaway: Useful when the clinical question extends beyond the lining
Gastric-Emptying Study
Measures how quickly a standardized meal leaves the stomach after mechanical obstruction has been excluded.
Best for: Persistent nausea, vomiting, early fullness, bloating, or suspected gastroparesis
Limitations: Medication, glucose, and test duration can affect accuracy
Takeaway: Use only when objective motility information will change treatment