| The cupola sign represents free intraperitoneal air located within the subphrenic space. |
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| Pathologic examination of the liver also identified a 10-cm abscess in the right lobe that had extended into the subphrenic space. |
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| At this time, metastatic infections, retroperitoneal and subphrenic infections, and osteomyelitis of the spine and ribs seldom lead to mediastinitis. |
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| Postoperatively, he developed a left subphrenic biloma treated by CT-guided percutaneous drainage, and he was discharged on the 28th postoperative day. |
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| Potential postoperative complications include subphrenic abcess, hemorrhage, duodenal or gastric fistula, atelectasis, pneumonia, wound infection, sepsis, and renal failure. |
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