Answer
Plain abdominal radiographs, though rarely diagnostic, frequently indicate the need for further investigation. [8] Abnormalities on plain abdominal films may include a localized ileus, extraluminal gas, air-fluid levels, mottled soft-tissue masses, absence of psoas outlines, or displacement of viscera.
In subphrenic or even subhepatic abscesses, the chest radiograph may show pleural effusion, elevated hemidiaphragm, basilar infiltrates, or atelectasis.
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Percutaneous computed tomography (CT) scan–guided drainage of postoperative subhepatic collection.
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Contrast-enhanced computed tomography (CT) scan of infected pancreatic pseudocyst (which can develop from acute necrotizing pancreatitis and give rise to an abscess).
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A 35-year-old man with a history of Crohn disease presented with pain and swelling in the right abdomen. Figure A shows a thickened loop of terminal ileum adherent to the right anterior abdominal wall. In figure B, the right anterior abdominal wall, adjacent to the inflamed terminal ileum, is markedly thickened and edematous. Figure C shows a right lower quadrant abdominal wall abscess and enteric fistula (confirmed by the presence of enteral contrast in the abdominal wall).
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