Patient: Male, 84-year-old Final Diagnosis: Mycotic internal iliac aneurysm with an iliaco-colonic fistula Symptoms: Gastrointestinal bleeding Clinical Procedure: Emergency endovascular repair• surgical intervention• long-term antibiotic therapy Specialty: Surgery Objective: Rare disease Background: Mycotic internal iliac artery aneurysms are exceptionally rare and life-threatening, especially when complicated by gastrointestinal fistulization and rupture. Case Report: This case report details the multidisciplinary …