MediastinumMediastinal NeoplasmsMediastinal DiseasesMediastinal CystThoracotomyEsophageal CystGanglioneuromaRadiography, ThoracicTomography, X-Ray ComputedThoracic Surgical ProceduresThoracic Surgery, Video-AssistedThoracoscopyMagnetic Resonance ImagingMediastinoscopyTreatment OutcomeMediastinitisGoiter, SubsternalThymus NeoplasmsPleural CavityThymomaBronchogenic CystPneumomediastinum, Diagnostic3-IodobenzylguanidineThoracic NeoplasmsChoristomaLymphangioma, CysticSternumSuperior Vena Cava SyndromeVisible Human ProjectsIncidental FindingsMediastinoscopesCranial Fossa, PosteriorEsophageal PerforationGastroscopesNeurilemmomaPlasma Cell Granuloma, PulmonaryParathyroid NeoplasmsFatal OutcomeMediastinal EmphysemaLiposarcomaThymus HyperplasiaRetroperitoneal NeoplasmsSeminomaLymphangiomaRadiopharmaceuticalsChylothoraxEndosonographyPleuraThoracostomyThymectomyHematemesisRadionuclide ImagingLung NeoplasmsSpermatoceleThoracic DiseasesGallium RadioisotopesEndoscopesBronchoscopyNeoplasms, Complex and MixedThoraxEsophagusComposite LymphomaEsophagectomyBiopsy, NeedleGiant Lymph Node HyperplasiaRetrospective StudiesMesenchymomaChest TubesHemothoraxTeratomaNeoplasms, Germ Cell and EmbryonalBronchial NeoplasmsEsophageal DiseasesNeckDrainageSclerosisBiopsyPosterior Cerebral ArteryPleural EffusionRupture, SpontaneousPleural NeoplasmsEsophageal FistulaThoracoscopesBronchoscopesBiopsy, Fine-NeedlePosterior Cruciate LigamentPneumonectomyEndodermal Sinus TumorHistiocytoma, Benign FibrousHyperparathyroidismSternotomyParaganglioma, Extra-AdrenalPancreatic PseudocystPleural DiseasesDebridementSubcutaneous EmphysemaFollow-Up StudiesTracheal DiseasesLymphatic DiseasesThyroidectomy