Posteroanterior X-ray chest (frontal incidence): i) homogeneous opacity without air bronchogram, vertically oriented along the right lateral aspect of thoracic vertebrae with an obtuse angle to the mediastinum suggestive of a mediastinal opacity; ii) the upper extremity of the mass extends above the superior clavicle, therefore, it is probably located within the posterior mediastinum (cervicothoracic sign); iii) no mediastal shift; iv) no spinal or costal abnormalities seen.