Chest Pain/diagnosis; Esophageal Perforation; Esophagus; Mediastinal Diseases; Pleural Effusion/diagnosis; Aged; C-Reactive Protein; Chest Pain/etiology; Chest Pain/physiopathology; Diagnosis, Differential; Esophageal Perforation/complications; Esophageal Perforation/diagnosis; Esophageal Perforation/physiopathology; Esophageal Perforation/surgery; Esophagus/pathology; Esophagus/physiopathology; Esophagus/surgery; Humans; Male; Mediastinal Diseases/complications; Mediastinal Diseases/diagnosis; Mediastinal Diseases/physiopathology; Mediastinal Diseases/surgery; Pleural Effusion/etiology; Radiography, Thoracic/methods; Tomography, X-Ray Computed/methods; Treatment Outcome; Vomiting/diagnosis; Vomiting/etiology; Vomiting/physiopathology