title: Mediastinal schwannoma with atypical localization diagnosed by endobronchial ultrasound.
abstract: BACKGROUND
  Schwannoma is a peripheral nerve sheath tumor usually originating from the posterior mediastinum. Because schwannomas can exhibit high fluorodeoxyglucose uptake on positron emission tomography, they cannot be distinguished from malignant tumors.
  
  
  OBJECTIVE
  We present this case to stress the importance of endobronchial ultrasonography in the diagnosis of intrapulmonary masses with rare occurrence and different localization.
  
  
  METHODS
  A patient was referred to our clinic for further workup of a soft tissue mass in the anterior mediastinum and diagnosed with a benign schwannoma by endobronchial ultrasonography.
  
  
  RESULTS
  The diagnosis is thus largely based on pathological examination. Until today schwannomas have been diagnosed by pathology examination of lesions excised surgically for suspected malignancy.
  
  
  CONCLUSIONS
  This article was reported since intrapulmonary schwannoma is a very rare tumor and this was the first case of an anterior mediastinal schwannoma diagnosed by endobronchial ultrasonography.
authors.affiliation: Department of Chest Disease, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Fatma
authors.initials: F
authors.lastname: Çiftci
authors.affiliation: Department of Chest Disease, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Aslıhan
authors.initials: A
authors.lastname: Gürün Kaya
authors.affiliation: Department of Chest Disease, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Ebru
authors.initials: E
authors.lastname: Karaçay
authors.affiliation: Department of Chest Disease, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Aydın
authors.initials: A
authors.lastname: Çiledağ
authors.affiliation: Department of Pathology, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Koray
authors.initials: K
authors.lastname: Ceyhan
authors.affiliation: Department of Chest Disease, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Akın
authors.initials: A
authors.lastname: Kaya
authors.affiliation: Department of Chest Disease, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Gökhan
authors.initials: G
authors.lastname: Çelik
mesh_terms: D000368:Aged; D001999:Bronchoscopy / Q000379:methods*; D061765:Endoscopic Ultrasound-Guided Fine Needle Aspiration / Q000379:methods; D005260:Female; D019788:Fluorodeoxyglucose F18 / Q000378:metabolism; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D008482:Mediastinum / Q000473:pathology; D009442:Neurilemmoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D000072078:Positron Emission Tomography Computed Tomography / Q000379:methods; D009418:S100 Proteins / Q000378:metabolism; D014463:Ultrasonography / Q000295:instrumentation*
chemical_list: D009418:S100 Proteins; D019788:Fluorodeoxyglucose F18
keywords: Anterior mediastinal tumor - EBUS - EBUS-TBNA - PET - schwannoma