Fig. 3

The chest computed tomography scan with a tumor of the mediastinum (1) and without pathology (2). The metastatic mass is circle-shaped, 77*43*65 mm, and heteroechoic. The tumor tightly abuts the aortic arch right by the course of the left recurrent laryngeal nerve.  Computed tomography scan of a different patient without any pathology of the mediastinum. The image is divided by a wide red line into two parts. All the important structures are marked with yellow, white and black inscriptions