Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest once again depict surgical chain sutures in the left upper lobe in unchanged position . The lungs are clear , and the hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion , and the pulmonary vascularity is normal .
    OUTPUT:
    
No evidence of pneumothorax or interval change .