Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left upper extremity PICC has been removed . The lungs are clear . There is no pleural effusion , pneumothorax or focal airspace consolidation . There is no lung mass seen within the resolution of chest radiography . The heart is normal size . The hilar and mediastinal structures are unremarkable .
    OUTPUT:
    
No lung mass .