Retroperitoneal FibrosisAutoimmune DiseasesRetroperitoneal SpaceRetroperitoneal NeoplasmsAutoimmunityCommon Variable ImmunodeficiencyUreteral ObstructionAntibodies, AntinuclearDuodenal ObstructionAutoantibodiesAortitisPergolideHydronephrosisFibrosisPanniculitis, PeritonealTomography, X-Ray ComputedPancreatitisSialadenitisCystic FibrosisPrednisoloneThyroiditisUreterMethysergidePericarditisCholangitis, Sclerosing