Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . The heart remains top normal in size . There is persistent retrocardiac linear density which is most compatible with atelectasis or scarring . Mild hilar engorgement appears stable from prior exam . No frank signs of pulmonary edema or pneumonia . No large effusions or pneumothorax is seen . Kyphotic angulation of the thoracic spine is again noted with rugger ___ appearance which is compatible with renal osteodystrophy . Clips are noted in the upper abdomen .
    OUTPUT:
    
Top normal heart size with mild hilar engorgement and retrocardiac atelectasis or scarring .