Mediastinoscopy.
D001706:Biopsy; D004724:Endoscopy / Q000009:adverse effects; D006801:Humans; D008171:Lung Diseases / Q000175:diagnosis; D008207:Lymphatic Metastasis / Q000175:diagnosis*; D008476:Mediastinal Cyst / Q000601:surgery; D008477:Mediastinal Diseases / Q000175:diagnosis*; D008479:Mediastinal Neoplasms / Q000175:diagnosis; D008722:Methods; D010138:Pacemaker, Artificial; D012507:Sarcoidosis / Q000175:diagnosis; D013934:Thymectomy; D014628:Vagotomy