ABNM Nuclear Medicine

Practice session

A 50-year-old woman presents with RUQ pain 6 hours after eating. On hepatobiliary (Tc-99m mebrofenin / HIDA) scan, the liver and common bile duct are seen but there is no gallbladder visualization at 60 minutes. After morphine sulfate augmentation (0.04 mg/kg IV), gallbladder still does not fill by 30 minutes. What is the MOST likely diagnosis?

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