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Infected Aneurysm after Endoscopic Submucosal Dissection.

A 79-year-old man on hemodialysis was hospitalized for further investigation. Early gastric cancer was diagnosed by gastrointestinal endoscopy and endoscopic submucosal dissection (ESD) was performed. Fever and abdominal pain thereafter developed, and a severe inflammatory response was observed on a blood test. Contrast computed tomography (CT) showed ulcer-like projections and soft tissue surrounding the aorta, from the celiac to left renal artery. An infected aneurysm was diagnosed. Although infected aneurysms developing after laparoscopic cholecystectomy or biopsy of contiguous esophageal duplication cyst have been reported, those developing after ESD have not. When fever and abdominal pain develop after ESD, an infected aneurysm should be considered and contrast CT performed.