Skin ManifestationsSkin DiseasesVasculitisErythema NodosumLupus Erythematosus, CutaneousAcrodermatitisDrug EruptionsSkinSystemic VasculitisRetinal VasculitisAnti-Neutrophil Cytoplasmic Antibody-Associated VasculitisVasculitis, Central Nervous SystemPolyarteritis NodosaChurg-Strauss SyndromeSkin Diseases, VascularSkin AgingRheumatoid VasculitisSkin NeoplasmsMicroscopic PolyangiitisPurpura, Schoenlein-HenochCryoglobulinemiaBehcet SyndromeSkin TestsSkin Physiological PhenomenaArteritisMucocutaneous Lymph Node SyndromeSkin AbsorptionGlomerulonephritisCryoglobulinsSkin PigmentationGiant Cell ArteritisPurpuraSkin UlcerAutoimmune DiseasesBiopsyLupus Erythematosus, SystemicAutoantibodiesImmunosuppressive AgentsTakayasu ArteritisUrticariaSkin, ArtificialPrednisoloneFatal OutcomeMercuric ChlorideSyndromeRetrospective StudiesLeg DermatosesPlasmapheresisEye DiseasesMethylprednisoloneAntigen-Antibody ComplexSkin Diseases, BacterialTreatment OutcomeCogan SyndromeErythemaDermatitisArthritis, RheumatoidLupus Vasculitis, Central Nervous SystemImmunoglobulin GAdrenal Cortex HormonesAntibodies, Monoclonal, Murine-DerivedSeverity of Illness IndexTemporal ArteriesOtorhinolaryngologic DiseasesPeripheral Nervous System DiseasesRheumatic DiseasesCyclophosphamideAntibodies, AntinuclearArthus ReactionPlasma ExchangeRheumatoid FactorRheumatoid NoduleAzathioprineGlucocorticoidsCecal DiseasesAnti-Inflammatory AgentsFever of Unknown OriginSerine EndopeptidasesNeutrophilsNecrosisImmune Complex DiseasesImmunoglobulins, IntravenousRecurrenceParaneoplastic SyndromesTomography, X-Ray ComputedImmunologic FactorsLung DiseasesEpidermisEnzyme-Linked Immunosorbent AssayBiological MarkersScleritisGangreneDisease Models, AnimalKidney DiseasesPulse Therapy, DrugSarcoidosisToesTime FactorsFollow-Up StudiesPrednisone