Purpura, Schoenlein-HenochPurpuraPurpura, Thrombocytopenic, IdiopathicPurpura, Thrombotic ThrombocytopenicPurpura FulminansPurpura, HyperglobulinemicPlasma ExchangeSplenectomyPlatelet CountADAM ProteinsAntigens, Human PlateletPlasmapheresisImmunoglobulins, IntravenousDanazolBlood PlateletsHemolytic-Uremic SyndromeNephritisRho(D) Immune GlobulinEcchymosisVasculitis, Leukocytoclastic, CutaneousLeg DermatosesPregnancy Complications, HematologicAutoantibodiesvon Willebrand FactorThrombocytopeniaPlatelet TransfusionOklahomaGlomerulonephritis, IGAAnemia, Hemolytic, AutoimmuneAutoimmune DiseasesMetalloendopeptidasesAntibodies, Monoclonal, Murine-DerivedImmunoglobulin GPrednisoloneAnemia, HemolyticAdrenal Cortex HormonesFatal OutcomeMethylprednisoloneThrombopoietinImmunoglobulin AImmunologic FactorsPlatelet Membrane GlycoproteinsPigmentation DisordersVasculitisCryoglobulinemiaIsoantibodiesRecurrenceChronic DiseaseDisseminated Intravascular CoagulationHemorrhageComplement C3HematuriaAcute DiseaseAntibodies, Antineutrophil CytoplasmicThrombopoiesisMeningococcal InfectionsTreatment OutcomePulse Therapy, DrugPlasmaMegakaryocytesLevamisoleHemoglobinuriaAntigen-Antibody ComplexHematologyPhenazopyridineDrug ContaminationEpistaxisSteroidsTuberculosis, SplenicAbdominal PainTelangiectasisReceptors, ThrombopoietinGingival HemorrhageLupus Erythematosus, SystemicAntibodies, MonoclonalPrednisoneImmunosuppressive AgentsPlatelet Glycoprotein GPIb-IX ComplexPolyarteritis NodosaRetrospective StudiesMelenaGlomerulonephritisQuinidineLymphangitisSkin DiseasesGlucocorticoidsgamma-GlobulinsRemission InductionIleal DiseasesPlatelet AggregationChurg-Strauss SyndromeBlood TransfusionPancytopeniaProtein CEar, ExternalHematologic DiseasesPlatelet Glycoprotein GPIIb-IIIa ComplexBlood Component TransfusionRenal InsufficiencyAntiphospholipid Syndrome