Investigating the Link Between Low Back Ache, Abdominal Discomfort and Oliguria: A Unique Case of Histopathology-Proven Retroperitoneal Fibrosis.

Retroperitoneal fibrosis (RPF) is a rare condition characterized by systemic inflammation and the proliferation of fibroinflammatory tissues in the retroperitoneum. It may lead to the formation of a retroperitoneal mass and can encase the aorta, its branches and ureters. The pathogenesis of RPF is not fully known.