MediastinumMediastinal NeoplasmsMediastinal DiseasesMediastinal CystMediastinoscopyThoracotomyTomography, X-Ray ComputedRadiography, ThoracicMediastinitisGoiter, SubsternalThymus NeoplasmsThoracic Surgery, Video-AssistedThoracic Surgical ProceduresPleural CavityThymomaBronchogenic CystThoracoscopyPneumomediastinum, Diagnostic3-IodobenzylguanidineThoracic NeoplasmsLymphangioma, CysticChoristomaSternumSuperior Vena Cava SyndromeEsophageal CystVisible Human ProjectsMediastinoscopesIncidental FindingsEsophageal PerforationGanglioneuromaGastroscopesPlasma Cell Granuloma, PulmonaryParathyroid NeoplasmsNeurilemmomaMediastinal EmphysemaThymus HyperplasiaLiposarcomaFatal OutcomeSeminomaRetroperitoneal NeoplasmsLymphangiomaChylothoraxRadiopharmaceuticalsEndosonographyPleuraTreatment OutcomeThoracostomyThymectomyHematemesisLung NeoplasmsSpermatoceleRadionuclide ImagingGallium RadioisotopesThoracic DiseasesNeoplasms, Complex and MixedBronchoscopyComposite LymphomaEndoscopesEsophagectomyGiant Lymph Node HyperplasiaEsophagusBiopsy, NeedleMesenchymomaChest TubesThoraxBronchial NeoplasmsTeratomaNeoplasms, Germ Cell and EmbryonalHemothoraxEsophageal DiseasesSclerosisDrainagePleural EffusionBiopsyNeckPleural NeoplasmsBronchoscopesThoracoscopesBiopsy, Fine-NeedleEsophageal FistulaMagnetic Resonance ImagingPneumonectomyRupture, SpontaneousEndodermal Sinus TumorHistiocytoma, Benign FibrousHyperparathyroidismParaganglioma, Extra-AdrenalSternotomyPancreatic PseudocystPleural DiseasesRetrospective StudiesSubcutaneous EmphysemaTracheal DiseasesLymphatic DiseasesThyroidectomyTuberculosis, Lymph NodeBrachiocephalic TrunkDebridementLymphatic MetastasisLymph Nodes