https://facts.net/fitness-and-wellbeing/health-science/50-facts-about-retroperitoneal-fibrosis/
Retroperitoneal fibrosis is a rare condition that can puzzle even the most seasoned doctors. It involves the development of excess fibrous tissue in the area be
retroperitoneal fibrosisfactsnet
https://www.termedia.pl/Case-report-HLA-B27-antigen-in-retroperitoneal-fibrosis-in-a-family,19,7872,1,1.html
Idiopathic retroperitoneal fibrosis is a rare disease of undetermined aetiology. It is important to distinguish this entity from retroperitoneal fibrosis...
case reportretroperitoneal fibrosishlaantigen