Abstract
A 59-year-old man with hypertension was referred to our hospital because of sudden lumbar pain. An emergency operation was performed because a computed tomographic scan revealed a ruptured abdominal aortic aneurysm. The aneurysm had ruptured into the retroperitoneal space, and an abscess of the iliopsoas muscle had formed. After debridement of the aneurysmal wall and surrounding infected tissues, a Y-graft replacement was accomplished using a woven Dacron graft. Peptostreptococcus was detected on culture examination of the blood and aneurysmal wall. A retroperitoneal abscess and empyema developed on the 24th, and 32nd postoperative days, respectively. The patient was discharged on the 98th postoperative day after successful treatment with antibiotics and drainage of the abscess. We encountered a case of ruptured abdominal aortic aneurysm caused by Peptostreptococcus infection.
