Members' NAVLE study guide

Canine GI Ulceration: Causes, PPIs & Surgery

2,884 words 12 min read 2 figures Reviewed November 9, 2026

Gastroduodenal ulceration is loss of the mucosa of the stomach or duodenum deep enough to expose the submucosa or deeper layers. Erosions stop at the mucosa; ulcers go deeper and can bleed heavily or perforate. In dogs most cases trace back to a drug (above all NSAIDs), a tumour or liver disease, so finding and removing the cause matters as much as suppressing acid.

Key facts

Gastrointestinal ulceration at a glance
  • Species and system: dog; stomach and duodenum (gastrointestinal).
  • Most commonly reported causes: NSAIDs, neoplasia and hepatic disease.
  • Classic presentation: vomiting, anorexia and abdominal pain, sometimes hematemesis or melena; many dogs show only vague signs or none.
  • Typical bloodwork: anemia (often with iron-deficiency changes), hypoproteinemia, increased urea with normal creatinine.
  • Gold standard diagnosis: endoscopy; ultrasound has low sensitivity for non-perforated ulcers.
  • Treatment of choice: a proton pump inhibitor (PPI) twice daily, plus removal of the cause; surgery for perforation.
  • Not zoonotic, not reportable.

What's inside

12 sections in the full guide
  1. Key facts
  2. How the NAVLE tests this
  3. Cause and pathophysiology
  4. Clinical signs
  5. Diagnosis
  6. Differential diagnoses
  7. Treatment and management
  8. Prevention
  9. Prognosis
  10. Quick review
  11. Test yourself
  12. References
The full guide also has 5 tables, 2 figures, 3 self-test questions and 11 references, available to NAVLE members.

Read the full study guide

The full guide is part of every NAVLE plan, with diagnosis and treatment tables, figures, a quick review and self-test questions. Start a free trial to try the question bank, or log in if you are already a member.

Read the free overview article A shorter, free article on Gastrointestinal ulceration on the NavleExam blog.

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Canine · Gastrointestinal/Digestive