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Anatomy
A 38-year-old woman is admitted to the hospital with signs of cholecystitis and gallbladder stones. During cholangiography, the catheter is inserted with difficulty into the gallbladder. Which of the following structures is most likely to interfere with the passage of the catheter into the cystic duct?
Cystic duct compression by a hepatic artery
Spiral valve (of Heister)
Tortuosity of the cystic duct
Adhesions from the hepatoduodenal ligament
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