Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Pneumomediastinum is demonstrated with a minimal amount of gas noted tracking into the fascial planes of the neck . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is not engorged . Lungs are hyperinflated without focal consolidation . No pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Pneumomediastinum . Hyperinflated lungs without focal consolidation .