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A 76-year-old woman presented with a 3-year history of intermittent and worsening right upper quadrant abdominal pain. The abdominal pain was not associated with nausea or vomiting, and did not get worse with food intake. Laboratory results were normal. Abdominal computed tomography (CT) showed a 2.3 x 1.9-cm fluid-filled lesion of the biliary system(More)
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