Periportal free gas sign of upper gastrointestinal perforated viscus
Acute abdominal pain.
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Free intra-peritoneal gas in the lesser sac and around the main portal and left veins.
Free gas in the periportal region, without evidences of gas in portal vein wall, is highly suggestive for upper GI visceral perforation. The patient went onto upper endoscopy and a perforated peptic ulcer was identified the in lesser curvature of the stomach.