An Isolated Infected Internal Iliac Artery Aneurysm Due to Anaerobic Bacteria

Abstract

A 65-year-old man was referred to our emergency center on the suspicion of an isolated internal iliac artery aneurysm perforated into the rectum. Intraoperative findings revealed a fist size of aneurysm adherent to the rectal colon and suspected anaerobic bacteria infection because of the putrescent smell. The aneurysm was resected except for the posterior wall that tightly adhered to the anterior wall of the rectum. No fistula connecting with the colon was revealed. During his hospital stay, we gave him intravenous antibiotics. He was discharged 42 days after the surgery. Oral administration of antibiotics was continued for 20 months after surgery then halted. He is free from recurrence of infection for 25 months after surgery.