MediastinumMediastinal NeoplasmsMediastinal DiseasesMediastinal CystMediastinoscopyThoracotomyTomography, X-Ray ComputedPleural CavityRadiography, ThoracicMediastinitisGoiter, SubsternalThymus NeoplasmsThoracic Surgery, Video-AssistedNasal CavityThoracic Surgical ProceduresThymomaBronchogenic CystThoracoscopyPeritoneal CavityPneumomediastinum, Diagnostic3-IodobenzylguanidineThoracic NeoplasmsLymphangioma, CysticChoristomaSternumSuperior Vena Cava SyndromeEsophageal CystVisible Human ProjectsIncidental FindingsMediastinoscopesGastroscopesEsophageal PerforationGanglioneuromaPleuraPlasma Cell Granuloma, PulmonaryFatal OutcomeNeurilemmomaParathyroid NeoplasmsDental Cavity PreparationMediastinal EmphysemaLiposarcomaThymus HyperplasiaLymphangiomaChylothoraxTreatment OutcomeRetroperitoneal NeoplasmsSeminomaRadiopharmaceuticalsEndosonographyThoracostomyLung NeoplasmsThymectomyMouthHematemesisRadionuclide ImagingThoracic DiseasesSpermatoceleBronchoscopyGallium RadioisotopesEndoscopesNeoplasms, Complex and MixedEsophagusDrainagePleural EffusionThoraxEsophagectomyComposite LymphomaChest TubesHemothoraxBiopsy, NeedleMesenchymomaGiant Lymph Node HyperplasiaTeratomaBronchial NeoplasmsBiopsyPleural NeoplasmsNeoplasms, Germ Cell and EmbryonalSclerosisEsophageal DiseasesRupture, SpontaneousMagnetic Resonance ImagingNeckPleural DiseasesThoracoscopesPneumonectomyEsophageal FistulaRetrospective StudiesBronchoscopesBiopsy, Fine-NeedleEndodermal Sinus TumorHistiocytoma, Benign FibrousHyperparathyroidismParaganglioma, Extra-AdrenalSternotomyPancreatic PseudocystSubcutaneous EmphysemaFistulaLymph NodesTracheal DiseasesLymphatic Metastasis