Abstract
We report the unusual case of a patient with a right hepatic artery aneurysm developing 20 years after an omental patch operation for duodenal ulcer perforation. When a 51-year-old man visited our Ningen Dock (health check-up) center, an abdominal ultrasound examination revealed a right extrahepatic artery aneurysm of 13 mm in diameter. As the patient did notice any symptoms, he ignored our recommendation for further examination and underwent Ningen Dock again a year later. As there had been no growth in the aneurysm, it was decided to conduct a follow-up examination each year．After that, the aneurysm grew slowly and was 21 mm in size six years later. He agreed to the treatment recommendation made then and coil embolization was performed successfully.
No other reports of hepatic artery aneurysm developing after an omental patch operation were found in a literature search. This seems to be the first case report. We feel it is of interest regarding aneurysmal behavior and decision making in such a case.
