الفهرس 
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Abstract
Over the last few years, minimally invasive techniques became popular diagnostic tools for establishing tissue diagnosis. They have many advantages being simple, safe, reliable, less costy and do not necessitate prolonged patient hospitalization. Percutaneous transthoracic C.T guided needle biopsy and thoracoscopic tHopsy are now used for the diagnosis of peripheral pulmonary shadows. Each technique The present study was performed on 30 patients with radiological evidence of peripheral pulmonary lesions. The patients were categorized into 2 groups : L. 23 cases with peripheral pulmonary lesions greater than 2 ern in diameter by C.T 2. 7 cases with peripheral pulmonary lesions less than or equals 2 cm in diameter by C.T This classification was undertaken to clarify the diagnostic accuracy of percutaneous transthoracic c:r guided needle biopsy and thoracoscopic biopsy. Percutaneous transthoracic C.T guided biopsy and thoracoscopic biopsy were performed for all cases. The results showed that the sensitivity of c:r guided biopsy was 42.86% for peripheral pulmonary Iesions c; 2 em In diameter by C.T and 94.45% for lesions greater thun 2 em diameter by C.T. The sensitivity of thoracoscopic biopsy was IOOeyo for both small and large peripheral pulmonary nodules. The complication rate of C.T guided needle biopsy were 6.67% pneumothorax and 3.330/0 hemothorax.)