Patient presentation
A 48-year-old woman presents to the emergency department with severe right upper quadrant pain that began suddenly after a fatty meal. She reports associated nausea, vomiting, and subjective fever. Her past medical history is notable for hyperlipidemia and obesity.
On examination she is febrile with RUQ tenderness and guarding, and a positive Murphy's sign (arrest of inspiration on deep palpation under the right costal margin). She is hemodynamically stable.
You are asked to evaluate her, establish a diagnosis, and direct management.
What you'll be asked — and what a strong resident discusses
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What is your differential diagnosis for this patient's presentation?
Expected answer
Acute calculous cholecystitis is most likely given the fatty-meal trigger, fever, RUQ pain/guarding, and positive Murphy's sign. The differential includes biliary colic, choledocholithiasis with or without cholangitis, gallstone pancreatitis, peptic ulcer disease/perforated ulcer, acute hepatitis, right lower lobe pneumonia, and pyelonephritis. In the right demographic I would also keep acalculous cholecystitis in mind. The classic risk profile (female, fertile-age, fat, forty) fits.
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What is your initial workup, and what is the first-line imaging study?
Expected answer
I would obtain CBC, comprehensive metabolic panel including LFTs and bilirubin, lipase, and coagulation studies. Right upper quadrant ultrasound is the first-line imaging test. Sonographic findings supporting acute cholecystitis include gallstones, gallbladder wall thickening (>4 mm in the absence of liver disease/ascites/right heart failure), gallbladder distention (long axis >8 cm), pericholecystic fluid, an impacted/incarcerated stone, and a sonographic Murphy's sign. The combination of stones, wall thickening, and a positive Murphy's sign has roughly a 95% predictive value for acute cholecystitis.
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Her LFTs are elevated. How does that change your thinking and workup?
Expected answer
Elevated transaminases and mild hyperbilirubinemia can indicate worsening inflammation and disease severity. More importantly, significant elevation (e.g., total bilirubin >1.5, AST >60) or a dilated common bile duct raises concern for concomitant choledocholithiasis or cholangitis. I would evaluate for CBD stones with MRCP or endoscopic ultrasound, both of which have ~95% sensitivity and specificity. If the patient shows signs of cholangitis (Charcot's triad), I would prioritize ERCP for biliary decompression along with antibiotics and resuscitation.
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How do you distinguish acute cholecystitis from simple biliary colic, and how does that change management?
Expected answer
Biliary colic is transient, self-limited pain from intermittent cystic duct obstruction—'comes and goes' after meals—without fever, leukocytosis, sustained tenderness, or a positive Murphy's sign, and with normal LFTs, cholelithiasis, and a normal gallbladder wall on ultrasound. Acute cholecystitis has persistent pain, systemic signs of inflammation, a positive Murphy's sign, and ultrasound signs of inflammation. Biliary colic can be managed with pain control, a low-fat diet, and elective cholecystectomy, whereas acute cholecystitis warrants cholecystectomy on the index admission.
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What is your initial management once acute cholecystitis is confirmed?
Expected answer
Resuscitate first: IV fluids, NPO status, analgesia, antiemetics, and correction of electrolytes. Start empiric antibiotics covering enteric gram-negatives and anaerobes. The definitive treatment is early laparoscopic cholecystectomy, ideally during the index admission. Early surgery reduces total hospital stay and morbidity compared to delayed/interval surgery.
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Why laparoscopic rather than open cholecystectomy, and what is the optimal timing?
Expected answer
Laparoscopic cholecystectomy is the gold standard. It produces a smaller systemic inflammatory response (lower cytokine levels), less morbidity, and faster recovery than open surgery. Early operation on the index admission is preferred for acute cholecystitis. Open cholecystectomy with CBDE has the lowest rate of retained stones in CBD disease but carries higher morbidity and mortality, particularly in the elderly, so it is reserved for selected situations.
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Intraoperatively you encounter a severely inflamed, scarred 'difficult gallbladder' and cannot define the critical view of safety. What do you do?
Expected answer
Safety of the biliary tree comes first. I would not blindly dissect or clip structures I cannot identify. Options include obtaining the critical view of safety only if achievable, intraoperative cholangiography to clarify anatomy, conversion to open if that helps, or—importantly—a subtotal/laparoscopic partial cholecystectomy. Partial cholecystectomy with closure of the cystic duct/gallbladder remnant is a recognized safe bailout that avoids common bile duct injury. The guiding principle is avoiding bile duct injury, not finishing the dissection at all costs.
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What patient and disease factors predict conversion from laparoscopic to open cholecystectomy?
Expected answer
Male sex, age 60–65 years, a sclerotic or thick-walled gallbladder (>4 mm), and acute cholecystitis itself are significant predictors of conversion. Recognizing these preoperatively helps with consent and planning. Conversion should be regarded as sound judgment to ensure safety, not a complication or failure.
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How would you approach a patient with acute cholecystitis who is too unstable or too high-risk for surgery?
Expected answer
In a critically ill or prohibitive-risk patient, source control can be achieved with a percutaneous cholecystostomy tube along with antibiotics and resuscitation. This temporizes the acute process and allows the patient to recover, with interval cholecystectomy considered later once optimized if appropriate.
What residents often miss
- Ordering a CT scan or MRCP before obtaining a right upper quadrant ultrasound, which is the appropriate first-line imaging.
- Failing to resuscitate (IV fluids, antibiotics, NPO) and instead rushing to the OR or delaying definitive care.
- Inappropriately delaying cholecystectomy to an 'elective' interval procedure when index-admission cholecystectomy is indicated for acute cholecystitis.
- Missing concomitant choledocholithiasis or cholangitis when LFTs/bilirubin are elevated and failing to pursue MRCP/EUS or ERCP.
- Pressing on with dissection in a difficult gallbladder without achieving the critical view of safety—risking common bile duct injury—rather than converting or performing a subtotal cholecystectomy.
- Treating conversion to open or subtotal cholecystectomy as a failure instead of a sound safety decision.
- Treating biliary colic as acute cholecystitis (or vice versa) by ignoring the absence of fever, leukocytosis, Murphy's sign, and ultrasound inflammatory findings.
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This page is educational content for general-surgery board-exam practice. It is not medical advice and is not a substitute for clinical judgment, institutional protocols, or current primary literature.