A 45-year-old man has abdominal pain for 1 day.He had similar abdominal pain in the past 5 years. Abdominal exam shows a mass with tenderness in the right upper quadrant.The most likely diagnosis is

  • A: chronic pancreatitis
  • B: carcinoma of gallbladder
  • C: carcinoma of pancreatic head
  • D: acute cholecystitis
  • E: cholecystolithiasis

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