Papers of the Week

Retroperitoneal fibrosis (RPF) is a rare disease characterized by fibro-inflammatory tissue proliferation in the retroperitoneum. It results in a chronic inflammatory and fibrosis condition, possibly leading to compression of the retroperitoneal structures, especially to encasement of the ureters and the inferior vena cava. It may have an idiopathic or a secondary origin. Spondyloarthritis (SpA) is one of the rare conditions described among the secondary forms.