title: Endobronchial ultrasound-guided transbronchial needle aspiration for the diagnosis of intrathoracic lymphadenopathy in patients with extrathoracic malignancy: a multicenter study.
abstract: BACKGROUND
  Mediastinal lymphadenopathy in patients with an extrathoracic malignancy is a common clinical scenario. Invasive sampling of intrathoracic lymph nodes may be performed by mediastinoscopy or endoscopic ultrasound-guided fine needle aspiration. Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is an alternative to mediastinoscopy and endoscopic ultrasound in patients with lung cancer and sarcoidosis. The utility of EBUS-TBNA in patients with extrathoracic malignancy was evaluated.
  
  
  METHODS
  Consecutive patients who were suspected to have intrathoracic lymph node metastases from an extrathoracic malignancy underwent EBUS-TBNA. When EBUS-TBNA did not provide a specific diagnosis, patients underwent mediastinoscopy or clinical follow-up of at least 6 months duration.
  
  
  RESULTS
  One hundred sixty-one patients meeting the inclusion criteria underwent EBUS-TBNA in five UK centers over a 3-year period. EBUS-TBNA diagnosed mediastinal or hilar metastases in 71 (44%) patients, new lung cancer in 20 (12%) patients, and sarcoidosis in 14 (9%) patients. The sensitivity, negative predictive value for malignancy, and overall accuracy for EBUS-TBNA were 87%, 73% and 88%, respectively. One hundred ten (68%) patients in the study had a final diagnosis of malignant intrathoracic lymphadenopathy.
  
  
  CONCLUSIONS
  Because of the high prevalence of alternative diagnoses, pathological evaluation is important in patients with extrathoracic malignancy and suspected mediastinal or hilar lymph node metastases. EBUS-TBNA is a safe and sensitive technique and may be considered a first-line investigation in these patients.
authors.affiliation: Center for Respiratory Research, University College London, London.
authors.forename: Neal
authors.initials: N
authors.lastname: Navani
authors.forename: Matthew
authors.initials: M
authors.lastname: Nankivell
authors.forename: Ian
authors.initials: I
authors.lastname: Woolhouse
authors.forename: Richard N
authors.initials: RN
authors.lastname: Harrison
authors.forename: Mohammed
authors.initials: M
authors.lastname: Munavvar
authors.forename: Ute
authors.initials: U
authors.lastname: Oltmanns
authors.forename: Mary
authors.initials: M
authors.lastname: Falzon
authors.forename: Gabrijela
authors.initials: G
authors.lastname: Kocjan
authors.forename: Robert C
authors.initials: RC
authors.lastname: Rintoul
authors.forename: Sam M
authors.initials: SM
authors.lastname: Janes
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044963:Biopsy, Fine-Needle; D001999:Bronchoscopy; D019160:Endosonography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008206:Lymphatic Diseases / Q000175:diagnosis* / Q000209:etiology; D008207:Lymphatic Metastasis; D008297:Male; D008481:Mediastinoscopy; D008875:Middle Aged; D009367:Neoplasm Staging; D009369:Neoplasms / Q000150:complications* / Q000473:pathology; D011379:Prognosis; D012680:Sensitivity and Specificity; D015996:Survival Rate; D013896:Thoracic Diseases / Q000175:diagnosis* / Q000209:etiology; D055815:Young Adult