In a hemodynamically stable patient with a known esophageal ulcer, a 10‑day history of melena, left‑lower‑quadrant abdominal pain, and a hemoglobin of 9.8 g/dL, should I obtain an abdominal computed tomography (CT) scan?

No, endoscopy should be the next step—not CT abdomen

In a hemodynamically stable patient with known esophageal ulcer, 10 days of melena, and mild anemia (Hgb 9.8), upper endoscopy is the appropriate next diagnostic and potentially therapeutic intervention, not CT abdomen. 1

Clinical Reasoning

Your patient presents with:

• Known esophageal ulcer (established bleeding source)
• Ongoing melena for 10 days (chronic, not acute bleeding)
• Hemodynamic stability (critical factor)
• Mild anemia (Hgb 9.8 g/dL)
• LLQ pain (may be unrelated or referred)

Why Endoscopy First

Endoscopy is the reference standard for both diagnosis and treatment of upper GI bleeding. 2 Since you already have a known esophageal ulcer, endoscopy serves multiple purposes:

• Visualizes the ulcer directly to assess for high-risk stigmata (active bleeding, visible vessel, adherent clot)
• Provides immediate therapeutic intervention if bleeding source is identified
• Evaluates for complications such as perforation or penetration (though your patient lacks signs of this)
• Assesses healing or progression of the known ulcer

The ACR guidelines explicitly state that "although endoscopy is considered the standard test of choice for diagnosing these entities, patients may present with nonspecific symptoms, which may lead to an imaging study." 2 Your patient doesn't have nonspecific symptoms—you have a known ulcer with ongoing bleeding.

Why NOT CT Abdomen

CT abdomen has limited utility in your specific scenario:

1. CT is not the test of choice when esophagitis or ulcer is strongly suspected 2

2. CT findings for esophageal pathology are suboptimal:

   • Distal esophageal wall thickening ≥5 mm has only 56% sensitivity and 88% specificity for reflux esophagitis 2
   • CT is "not typically used" for esophageal indications 2

3. Your patient is hemodynamically stable—CT angiography is reserved for unstable patients or those with massive ongoing bleeding requiring >5 units transfusion 3, 4

4. The LLQ pain is likely a red herring—melena from upper GI bleeding can cause cramping abdominal pain from blood in the bowel

When CT Would Be Appropriate

CT abdomen/pelvis WITH IV contrast would be indicated if:

• Hemodynamic instability develops (shock index >1) 3
• Endoscopy fails to identify bleeding source despite clinical evidence of ongoing bleeding 1, 4
• Suspicion for perforation or penetration (free air, peritoneal signs)—which your patient lacks 2
• Active massive bleeding requiring localization before intervention 3

The British Society of Gastroenterology specifically recommends: "if a patient is haemodynamically unstable or has a shock index >1 after initial resuscitation and/or active bleeding is suspected, CT angiography provides the fastest and least invasive means to localise the site" 3—but your patient is stable.

Common Pitfall to Avoid

Don't be distracted by the LLQ pain. Upper GI bleeding commonly causes lower abdominal discomfort as blood transits through the intestines. The melena confirms upper GI source, and you already know about the esophageal ulcer. Ordering CT first delays definitive diagnosis and treatment.

Recommended Management Algorithm

1. Maintain hemodynamic stability with restrictive transfusion strategy (transfuse if Hgb <7 g/dL in patients without cardiovascular disease) 5

2. Perform upper endoscopy within 24 hours 1, 6—sooner if any hemodynamic changes occur

3. Endoscopic hemostasis if indicated based on stigmata of recent hemorrhage 7

4. Consider CT only if:

   • Endoscopy is non-diagnostic but bleeding continues
   • Patient becomes unstable
   • Clinical suspicion for perforation/penetration develops

5. Optimize medical therapy with proton pump inhibitors 6

The 10-day duration of melena suggests chronic oozing rather than acute arterial bleeding, making endoscopic visualization and treatment both feasible and appropriate as the initial intervention.