Presentation
Patient with an episode of upper abdominal pain that had started three days ago.
Patient Data
Free peritoneal gas is visualized predominantly in the upper abdomen. The perforation site is seen in the pyloric region / pyloric canal of the stomach. A small locoregional hyperdensity resembles a blood clot (compare contrast and non-contrast series).
There are moderate collections of free intraperitoneal fluid.
Liver, renal, and splenic cysts are noted.
Case Discussion
This case shows a perforated peptic ulcer of the stomach. The perforation site is visible on CT, located in the prepyloric region (Type III in the modified Johnson classification).