title: Mediastinal tumors. Diagnosis: invasive techniques.
authors.affiliation: Division of Thoracic Surgery, Toronto General Hospital, Ontario.
authors.forename: F G
authors.initials: FG
authors.lastname: Pearson
mesh_terms: D001707:Biopsy, Needle; D006801:Humans; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000601:surgery; D008481:Mediastinoscopy; D008482:Mediastinum / Q000473:pathology / Q000601:surgery