DermatomyositisPolymyositisMyositisSkinParaneoplastic SyndromesLung Diseases, InterstitialMediastinal EmphysemaSkin DiseasesPanniculitisMuscle WeaknessSkin AgingHistidine-tRNA LigaseSkin NeoplasmsAutoantibodiesLupus Erythematosus, CutaneousPrednisoloneMuscle, SkeletalRheumatic DiseasesMyositis, Inclusion BodyBiopsyImmunosuppressive AgentsImmunoglobulins, IntravenousConnective Tissue DiseasesTelangiectasisMicroscopic Angioscopy