A Case of Idiopathic Retroperitoneal Fibrosis Triggering Recurrent Gastrointestinal Bleeding.

Idiopathic retroperitoneal fibrosis (IRF) is a rare condition characterized by fibrous tissue proliferation in the retroperitoneal space, commonly affecting the ureters and other abdominal structures. This case report describes a previously undocumented presentation of IRF in a 52-year-old female, who presented with recurrent gastrointestinal bleeding and severe anemia over six months. Diagnostic workup included endoscopy, colonoscopy, abdominal computed tomography (CT), and biopsy, revealing fibrous encasement of the mesenteric vessels leading to ischemic damage and gastrointestinal bleeding.