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The present study was designed to evaluate the diagnostic yield of TBNA in the diagnosis of extrabronchial and mediastinal lesions in order to avoid unnecessary mediastinoscopies or other surgical procedures. This study included thirty patients. Twenty patients with clinical and radiological evidence of mediastinal lymph node enlargement, and ten patients with extrabronchial mass lesion causing an extraluminal compression who were admitted to Al Hussien university hospital and Bab El-Shariah university hospital, chest department in the period between May 2010 and May 2012. All patients wersubjected to the following: history taking, clinical examination, plain chest Xray posteroanterior and lateral views, computerized tomography of the chest with contrast, routine laboratory investigations, fiberoptic bronchoscopy for inspection of the tracheobronchial tree and biopsy using TBNA, histopathological and cytological examination of the specimens. Some patients needed other investigations to confirm or reach the diagnosis such as mediastinoscopy, C.T guided biopsy and limited thoracotomy. The diagnostic yeild TBNA in diagnosis of non-malignant lesions was 75%, 33% in sarcoidosis, 100% in TB and non-specific inflammation, and 77.7% in malignant lesions, 75%

ROLE OF TRANSBRONCHIAL NEEDLE ASPIRATION IN DIAGNOSIS OF EXTRABRONCHIAL AND MEDIASTINAL LESIONS