Mediastinoscopy.
D001706:Biopsy / Q000379:methods; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology; D008477:Mediastinal Diseases / Q000473:pathology; D008481:Mediastinoscopy / Q000379:methods* / Q000639:trends; D009367:Neoplasm Staging