 (Front view) chest X-ray showing an air-density band around the mediastinum (arrows), characterizing pneumomediastinum, which extends to the cervical region and chest wall, dissecting along the fibers of the pectoral muscles (dashed arrow). Note the extensive involvement of the lungs by areas of consolidation and reticular opacities, distributed in the lung periphery, especially on the right side, where one can also see a small pneumothorax (arrowheads).