title: [Clinical value of mediastinoscopy in the diagnosis of mediastinal mass: an analysis of 60 cases].
abstract: OBJECTIVE
  To study the value of mediastinoscopic examination in the accurate diagnosis of mediastinal mass.
  
  
  METHODS
  Standard cervical mediastinoscopy (SCM) or extended mediastinoscopy was applied to patients with mediastinal mass on chest CT or MRI, in order to obtain suspicious tissues at peritracheal, retrosternal, subcarinal, or bilateral hilar areas for pathological study.
  
  
  RESULTS
  Of 60 cases in this series, 58 got definite pathological diagnoses. Of the 58 cases, 30 were diagnosed as malignancies, accounting for 51.7% of the cases examined. Twenty-eight of the 58 were diagnosed as benign accounting for 48.3% of them. Small-cell undifferentiated carcinoma was the most common type of malignancy, followed by lymphoma, metastatic adenocarcinoma and squamous cell carcinoma in decreasing frequencies. Over one half of the patients with benign lesions were tuberculosis, followed by sarcoidosis. In this series, 93% of the cases received SCM examination. The most common sampling sites were 2R and 4R areas.
  
  
  CONCLUSIONS
  Mediastinoscopy is a valuable procedure which helps clarify diagnosis of mediastinal mass.
authors.affiliation: Department of Thoracic Surgery, Cancer Institute (Hospital), Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China.
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: D
authors.initials: D
authors.lastname: Zhang
authors.forename: R
authors.initials: R
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008481:Mediastinoscopy; D008875:Middle Aged