Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacer device is stable in position . Large - bore left - sided central venous catheter is seen , difficult to discern where the distal tip is due to overlying pacer wires . The cardiac silhouette remains mildly enlarged . The aortic knob is calcified . The aorta is likely tortuous . There is a moderate left pleural effusion , with overlying atelectasis . Minimal to no right pleural fluid is seen . Minimal pulmonary vascular congestion is seen . No evidence of pneumothorax .
    OUTPUT:
    
Moderate left pleural effusion with overlying atelectasis .