Interpretation of this abdominal xray
| Rank | Cause |
|---|---|
| 1st | Perforated peptic/duodenal ulcer (most common cause of pneumoperitoneum) |
| 2nd | Perforated gastric ulcer |
| 3rd | Colonic perforation (sigmoid diverticulitis, tumor, ischemia) |
| 4th | Small bowel perforation (typhoid, trauma, ischemia) |
Clinical note: This X-ray alone is diagnostic of perforation. There is no role for conservative management. The sooner surgical intervention is undertaken, the better the outcome - mortality rises sharply with each hour of delay in peritonitis.