Presentation
Incidental finding.
Patient Data
Age: 1 year
Gender: Male
From the case:
Vacuum phenomenon in the wrist
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The radiolucent semilunar shadows are seen in the wrists due to the mild traction as an incidental finding.
Case Discussion
The radiolucent semilunar shadows are characteristic of the vacuum phenomenon, which is gas (principally nitrogen), presumably originating from the surrounding tissues due to mild traction for positioning.
A case of Prof. Saeed Rad's archive, Tabriz university of medical sciences, Radiology department, Iran.