Rigler sign

Case contributed by The Radswiki

Presentation

Abdominal pain.

Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

X-ray

X-ray demonstrates a Rigler sign, of pneumoperitoneum

Annotated image

Box highlights positive Rigler sign. 

CT

CT confirms the finding. Lung windows can be helpful in finding free gas in the abdomen. 

Case Discussion

This case was donated to Radiopaedia.org by Radswiki.net

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