Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest ___ at 17 : 18 is submitted .
    OUTPUT:
    
Lungs remain hyperinflated with parenchymal scarring consistent with known underlying emphysema . A left chest tube remains in place and there is a stable small left apical pneumothorax . A right Port - A - Cath is unchanged in position . The patient is status post median sternotomy for CABG and aortic valve replacement with stable postoperative cardiac and mediastinal contours . No large effusions are seen . No pulmonary edema . Nodular opacity at the left lung base likely reflects a nipple shadow .