Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal views of the chest . Heart size and mediastinal contours are normal . Small left base density may represent soft tissue or consolidation . Right base atelectasis is similar to prior . No focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
Small density overlying the left lower lung may represent soft tissue or consolidation . A lateral view is recommended for localization .