title: [Usefulness of endoscopic ultrasound-guided fine needle aspiration in the diagnosis of mediastinal lesions].
abstract: OBJECTIVE
  Endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) is a safe and effective technique for the diagnosis of focal pancreatic lesions and enlarged abdominal lymph nodes. The aim of this study was to assess the usefulness of EUS-FNA in the diagnosis of mediastinal lesions.
  
  
  METHODS
  A retrospective review was performed of all consecutive cases in which EUS-FNA was used for the diagnosis of a mediastinal lesion between January 2001 and September 2003. We used a radial echoendoscope to assess the characteristics of the lesion and a linear-array echoendoscope to perform transesophageal needle aspiration with a 22-gauge needle. Histopathology of the resected specimen was considered as the gold standard in surgically treated patients whereas cytology obtained by EUS-FNA was the gold standard when surgery was not indicated.
  
  
  RESULTS
  EUS-FNA was performed in 59 patients with a total of 89 lesions with mean (SD) dimensions of 2.4 (2.0) cm x 1.6 (1.4) cm. Malignant lesions were larger than benign ones (short axis, 2.7 [1.4] as compared with 1.0 [0.9] cm; P< .001). The diagnosis was obtained for 53 patients (90%) and 81 lesions (91%) with a mean of 2 (1) passes per lesion. The sensitivity, specificity, positive and negative predictive values, and diagnostic accuracy of EUS-FNA were 81%, 100%, 100%, 75%, and 88%, respectively, when analyzed by lesion, and 88%, 100%, 100%, 80%, and 92% when analyzed by patient.
  
  
  CONCLUSIONS
  EUS-FNA is an effective technique for the diagnosis of mediastinal lesions. The likelihood of malignancy increases with size.
authors.affiliation: Unidad de Endoscopia, Institut de Malalties Digestives i Metabòliques, Hospital Clínic, Barcelona, Spain.
authors.forename: Glòria
authors.initials: G
authors.lastname: Fernández-Esparrach
authors.forename: Maria
authors.initials: M
authors.lastname: Pellisé
authors.forename: Manel
authors.initials: M
authors.lastname: Solé
authors.forename: Josep
authors.initials: J
authors.lastname: Belda
authors.forename: Oriol
authors.initials: O
authors.lastname: Sendino
authors.forename: Josep
authors.initials: J
authors.lastname: Llach
authors.forename: Alfredo
authors.initials: A
authors.lastname: Mata
authors.forename: Josep Maria
authors.initials: JM
authors.lastname: Bordas
authors.forename: Angels
authors.initials: A
authors.lastname: Ginés
mesh_terms: D000008:Abdominal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044963:Biopsy, Fine-Needle; D002277:Carcinoma / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D019160:Endosonography / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D008198:Lymph Nodes / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D012189:Retrospective Studies