A 48-year-old woman on chronic NSAIDs for osteoarthritis presents with a 6-week history of epigastric pain, early satiety, and weight loss of 2 kg. Upper endoscopy reveals a 3 cm ulcer in the antrum with clean base and no active bleeding. H. pylori serology is negative. What is the most appropriate next step in management?

Explanation

## Clinical Context: NSAID-Induced Ulcer This patient has a **large NSAID-induced gastric ulcer** (3 cm, antral location) with: - Chronic NSAID use (clear aetiology) - H. pylori negative (rules out H. pylori-induced ulcer) - Clean base (no active bleeding — allows outpatient management) - Symptoms of delayed healing (6 weeks of pain + weight loss) ## Why High-Dose PPI + NSAID Discontinuation? **Key Point:** NSAID-induced ulcers require BOTH: 1. **Discontinuation of the offending NSAID** — essential for ulcer healing 2. **High-dose PPI** (omeprazole 40 mg BD or equivalent) — accelerates healing ## Healing Timeline & Monitoring | Ulcer Feature | Standard Dose PPI | High-Dose PPI | NSAID Discontinued? | |---|---|---|---| | Small gastric ulcer (<1 cm) | 4–6 weeks | 2–4 weeks | Recommended | | Large gastric ulcer (≥3 cm) | 8–12 weeks | 6–8 weeks | **Essential** | | Duodenal ulcer | 4–6 weeks | 2–4 weeks | Recommended | **Clinical Pearl:** A 3 cm antral ulcer is **large** and at higher risk of: - Delayed healing - Recurrence if NSAID restarted - Potential malignancy (though clean base and H. pylori negative make this less likely) ## Management Algorithm ```mermaid flowchart TD A[NSAID-induced gastric ulcer]:::outcome --> B{Ulcer size?}:::decision B -->|Small <1 cm| C[Discontinue NSAID + PPI 20 mg daily]:::action B -->|Large ≥3 cm| D[Discontinue NSAID + PPI 40 mg BD]:::action C --> E[Repeat endoscopy at 4-6 weeks]:::action D --> F[Repeat endoscopy at 8 weeks]:::action E --> G{Healed?}:::decision F --> H{Healed?}:::decision G -->|Yes| I[Continue PPI for 4 weeks]:::action G -->|No| J[Investigate for malignancy]:::urgent H -->|Yes| K[Continue PPI for 4-8 weeks]:::action H -->|No| L[EUS or repeat biopsy for malignancy]:::urgent ``` ## Why NOT Standard-Dose PPI? **High-Yield:** Large NSAID-induced gastric ulcers (≥3 cm) require **high-dose PPI** (omeprazole 40 mg BD, lansoprazole 30 mg BD, or pantoprazole 40 mg BD) to accelerate healing and reduce recurrence risk. Standard dose (20 mg daily) is insufficient for large ulcers. ## Why Repeat Endoscopy at 8 Weeks? 1. **Confirm healing** — ensures ulcer has closed 2. **Exclude malignancy** — large gastric ulcers that do not heal despite high-dose PPI and NSAID cessation raise concern for gastric cancer ("ulcer that will not heal" is a red flag) 3. **Assess for complications** — scarring, pyloric stenosis **Warning:** Do NOT assume a large gastric ulcer is benign based on endoscopic appearance alone. If it fails to heal after 8 weeks of high-dose PPI + NSAID discontinuation, endoscopic ultrasound (EUS) with biopsy is indicated to exclude malignancy. ## Alternative NSAID Strategy (If NSAID Continuation Necessary) If the patient cannot discontinue NSAIDs (e.g. severe osteoarthritis): - Switch to a COX-2 selective inhibitor (celecoxib) + high-dose PPI - OR continue NSAID + high-dose PPI + misoprostol - Recheck for healing at 8 weeks [cite:Harrison 21e Ch 297]