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Images of Memorable Cases: Case 124

Module by: Herbert L. Fred, MD, Hendrik A. van Dijk

http://rup.rice.edu/memcases-button.jpg

Case_124-pres1-1.jpg

Lateral chest radiograph of a 15-year-old boy who experienced acute pleurisy following a severe bout of vomiting.

124. The “ring around the artery” sign

Air surrounding the right pulmonary artery (arrows, image below) has been documented in only a few cases and is diagnostic of pneumomediastinum. It is best seen on the lateral projection and may be the only radiographic evidence of pneumomediastinum.

Case_124-diag1-1.jpg

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