Case: Abdomen radiograph #96365933
Abdomen Beginner
Read this radiograph systematically before revealing the answer. What is the main abnormality?

Image: Hellerhoff via Wikimedia Commons · CC BY-SA 4.0 · source · resized and converted to WebP
Tip: scroll or pinch to zoom, drag to pan, and try Invert.
Answer: Pneumoperitoneum (free intraperitoneal gas)
What to look for in pneumoperitoneum (free intraperitoneal gas)
- Lucent crescent beneath the hemidiaphragm(s).
Description by the image author (may be in another language): Pneumoperitoneum bei Sigmaperforation (iatrogen). Rigler-Zeichen: Luft an beiden Seiten der Darmwand. Hier jedoch sicher nicht zu übersehen.
Educational case. The diagnosis comes from the image's documented source; the "what to look for" list describes the condition in general and is not a report of this individual image.





