Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker is noted with three intact leads which remain unchanged in position . The lungs are hyperinflated but grossly clear . There is no lobar consolidation , pneumothorax , or right pleural effusion . Probable trace left pleural effusion with adjacent atelectasis is noted . Mild - moderate cardiomegaly is unchanged . Calcifications are noted in the aortic knob . S - shaped scoliosis is unchanged , with a rotary and dextroscoliotic component centered in the mid thoracic spine .
    OUTPUT:
    
Stable , mild - moderate cardiomegaly , small left pleural effusion , and adjacent atelectasis .