Pneumoperitoneum is a common phenomenon after abdominal surgery, decreasing in frequency with time. The air is most often residual and not a sign of disruption of the gastrointestinal tract. Obesity, female sex, and occurrence of free air several weeks after surgery are factors suggestive of a leak, but the significance of a postoperative pneumoperitoneum on CT should be determined mainly by the clinical setting.
The association between IVC anomalies and absence of the right kidney as detected on CT probably was not incidental. Although most patients had symptoms deriving from the anomalies, these might have been clinically silent. The radiologist should be aware of the possible association between these anomalies, which can be detected on CT.
The most specific sonographic finding for wandering spleen is low position of the spleen. However, if the spleen regains its normal or near-normal position, the diagnosis may be missed and the condition may recur, and result in complications.
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