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40 patients with suspected mediastinal tumors were independently examined with computed tomography (CT) and sonography. The findings were confirmed by bronchoscopy, mediastinoscopy or surgery. In the assessment of the upper and middle mediastinum, sonography reaches a high sensitivity. On the contrary, in the evaluation of the anterior and posterior mediastinum, sonography is clearly inferior to CT. 90% of the tumors demonstrated by CT could be assessed with sonography. The most frequent tumors can be diagnosed with ultrasound. The evaluation of tumors in the paravertebral and retrosternal space is limited. Sonography of the mediastinum is a noninvasive, well-reproducible and cost-effective imaging modality that provides important information in cases of unclear X-ray and CT findings. The preliminary results encourage to a more frequent use of mediastinal sonography.
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