In a 52-year-old woman with three days of epigastric pain that worsened last night, now experiencing eight episodes of vomiting, a bubble-like sensation in the stomach radiating to the scapular region, and no fever, respiratory symptoms, or weight loss, what are the differential diagnoses and appropriate management plan?

Differential Diagnosis and Management Plan

This presentation is highly concerning for acute biliary pathology—most likely acute cholecystitis or choledocholithiasis—and requires urgent right upper quadrant ultrasound followed by surgical consultation if imaging confirms biliary disease.

Differential Diagnosis (Prioritized by Likelihood and Urgency)

Most Likely Diagnoses

1. Acute Cholecystitis/Choledocholithiasis

• The classic triad is present: epigastric pain radiating to the scapular region (between shoulder blades), progressive worsening at night, and persistent vomiting
• The "bubble sensation" may represent biliary colic or distended gallbladder
• Age and female sex are risk factors
• Absence of fever does NOT exclude cholecystitis (can be present in only 35-50% of cases)

2. Peptic Ulcer Disease (PUD) with Possible Perforation

• Epigastric pain with severe vomiting raises concern for gastric outlet obstruction or perforation
• PUD-related perforation is a surgical emergency with mortality up to 30% 1
• The radiation to the back could represent posterior wall penetration
• Absence of fever does not exclude perforation in early stages

3. Acute Pancreatitis

• Epigastric pain radiating to the back is classic
• Vomiting is common
• However, typically presents with more severe, constant pain

Less Likely but Important to Consider

4. Gastroesophageal Reflux Disease (GERD)/Gastritis

• Can present with epigastric pain and vomiting
• Usually less acute in presentation
• Symptoms typically less severe

5. Gastric Outlet Obstruction (from various causes including malignancy, though less likely given no weight loss)

Immediate Management Algorithm

Step 1: Initial Assessment and Stabilization

• Vital signs: Check for hemodynamic instability, tachycardia, hypotension
• IV access: Establish for fluid resuscitation
• NPO status: Nothing by mouth immediately
• IV fluids: Aggressive hydration with normal saline or lactated Ringer's (she's had 8 episodes of vomiting)
• Antiemetics: Ondansetron 4-8 mg IV

Step 2: Urgent Laboratory Testing

• Complete blood count: Look for leukocytosis (though absence doesn't exclude infection)
• Comprehensive metabolic panel: Assess electrolytes, renal function, glucose
• Hepatobiliary markers: AST, ALT, alkaline phosphatase, total/direct bilirubin (elevated in choledocholithiasis)
• Lipase: To evaluate for pancreatitis
• C-reactive protein: Elevated in inflammatory conditions
• Pregnancy test: Mandatory in all women of reproductive age before imaging 2

Step 3: Imaging Strategy

Primary recommendation: Right Upper Quadrant Ultrasound

• Ultrasonography is the initial imaging test of choice for right upper quadrant pain 2
• Can diagnose cholecystitis, cholelithiasis, bile duct dilation
• No radiation exposure
• Highly sensitive for gallstones and gallbladder wall thickening
• Can be performed immediately at bedside

If ultrasound is inconclusive or suggests complications:

• CT abdomen/pelvis with IV contrast is indicated 1
• CT can detect: perforation (extraluminal gas in 97% of cases), gastric/duodenal wall thickening, mucosal hyperenhancement, focal wall defects, ascites, fat stranding 1
• Use neutral oral contrast (water) rather than positive contrast to assess for mucosal enhancement and intraluminal bleeding 1
• CT without contrast may miss critical findings like interrupted mucosal enhancement

Step 4: Specialist Consultation

Surgical consultation should be obtained urgently if:

• Ultrasound confirms acute cholecystitis
• Any signs of perforation on imaging
• Clinical deterioration despite initial management
• Peritoneal signs on examination

Gastroenterology consultation for:

• Consideration of urgent upper endoscopy if PUD is suspected and patient stabilizes
• Endoscopy is the gold standard for diagnosing PUD, gastritis, and GERD 1

Step 5: Empiric Treatment While Awaiting Imaging

If biliary pathology suspected:

• Broad-spectrum antibiotics (e.g., ceftriaxone 1-2g IV + metronidazole 500mg IV)
• Pain control with opioids (avoid NSAIDs which worsen PUD)

If PUD suspected:

• Proton pump inhibitor: Pantoprazole 40-80mg IV
• Avoid NSAIDs and aspirin

Critical Pitfalls to Avoid

1. Don't dismiss the diagnosis based on absence of fever—many acute abdominal emergencies present without fever initially
2. Don't delay imaging—the radiation to the back with persistent vomiting suggests a complication requiring urgent intervention
3. Don't use conventional radiography—it has limited diagnostic value in acute abdominal pain 2
4. Don't order CT without IV contrast if PUD or cholecystitis is suspected—contrast is essential for detecting mucosal enhancement abnormalities and inflammatory changes 1
5. Don't forget pregnancy testing—ectopic pregnancy can present similarly 3

Disposition

• Admit to hospital for observation, serial examinations, and definitive management
• Surgical floor or step-down unit if imaging confirms surgical pathology
• Patient should remain NPO until diagnosis is established

The combination of epigastric pain radiating to the scapular region with progressive worsening and intractable vomiting in a 52-year-old woman strongly suggests biliary tract disease requiring urgent evaluation and likely surgical intervention 1, 2.