Pneumoperitoneum

Pneumoperitoneum is the abnormal presence of air or other gas in the peritoneal cavity. The most common cause is a perforated abdominal viscus, often a perforated peptic ulcer, although any part of the bowel may perforate from a benign ulcer, tumor, or abdominal trauma. The diagnosis of pneumoperitoneum is typically made by physical examination and imaging tests such as X-rays or CT scan. Treatment involves surgery to address the underlying cause, antibiotics, and supportive care.