MEDIASTINOSCOPY.
D001706:Biopsy; D004724:Endoscopy; D006801:Humans; D008481:Mediastinoscopy; D008482:Mediastinum; D009369:Neoplasms / Q000175:diagnosis*; D013899:Thoracic Neoplasms
BIOPSY; ENDOSCOPY; MEDIASTINUM; NEOPLASM DIAGNOSIS; THORACIC NEOPLASMS