Retroperitoneal FibrosisRetroperitoneal SpaceRetroperitoneal NeoplasmsUreteral ObstructionFibrosisDuodenal ObstructionCystic FibrosisAortitisPergolideHydronephrosisPanniculitis, PeritonealTomography, X-Ray ComputedPancreatitisSialadenitisPrednisoloneThyroiditisUreterAutoimmune DiseasesMethysergidePericarditisCholangitis, Sclerosing