Fibrosis retroperitoneal | Idiopathic retroperitoneal fibrosis | Retroperitoneal fibrosis | Ormond's disease | Retroperitoneal Fibrosis | Fibroses, Retroperitoneal | Fibrosis, Retroperitoneal | Retroperitoneal Fibroses | Ormond's Disease | Disease, Ormond's | Idiopathic Retroperitoneal Fibrosis | Ormond Disease | Disease, Ormond | Periaortitis, Chronic | Chronic Periaortitides | Chronic Periaortitis | Periaortitides, Chronic | Fibrosis, Perianeurysmal Inflammatory | Perianeurysmal Inflammatory Fibrosis | Inflammatory Perianeurysmal Fibrosis | Perianeurysmal Fibrosis, Inflammatory | Fibrosis, Inflammatory Perianeurysmal | Inflammatory Fibrosis, Perianeurysmal |