[An elderly woman with duodenal perforation difficulty diagnose].

An 86-year-old woman was referred with acute epigastric pain. She had tenderness, but no muscular guarding of the epigastric lesion. Abdominal ultrasound showed a gallstone with a normal gallbladder wall and no ascites. The white blood cell count was 11,600/mm(3), but she was negative for C-reactive protein (CRP). An upper gastrointestinal tract endoscopic examination revealed only edema of the duodenal mucosa. Although H2-receptor antagonists were given, she had to be admitted due to chills and high fever. While the abdominal symptoms did not change, the CRP concentration became 14.79mg/dl. While plain abdominal X-ray did not show an abnormal gas pattern, subsequent abdominal CT examination showed air and fluid collection around the second portion of the duodenum. We diagnosed duodenal perforation and prepared for emergency operation. However, her general condition had markedly deteriorated during the hours. Laparotomy revealed a free purulent fluid around second portion of the duodenum caused by perforation of a duodenal diverticulum. The patient gradually recovered and was discharged after 58 days. Since a duodenal perforation in an elderly patient is difficult to diagnose early in spite of serious illness, abdominal CT should be encouraged.