Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate hyperexpansion of the lungs bilaterally . The previously seen central venous catheter has intervally been removed . The patient is status post sternotomy and aortic valve graft repair , with a stable postoperative appearance . There has been near complete interval resolution of the previously seen left - sided pleural effusion . There is no focal opacity and no pneumothorax is seen . There is no evidence of pulmonary edema . Degenerative changes are present within the thoracic spine . Clips are noted in the right neck .
    OUTPUT:
    
Residual small left pleural effusion .