Presentation
Post-endoscopic retrograde cholangiopancreatography (ERCP) with sphincterotomy.
Patient Data
Age: 70 years
Gender: Female
From the case:
Pneumoretroperitoneum
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Axial non-contrast

Gas in the retroperitoneal space following ERCP with sphincterotomy. The lung window helps to easily appreciate the gas distribution.
Case Discussion
Pneumoretroperitoneum is by definition presence of gas within the retroperitoneal space.