Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left apical pneumothorax is stable in size since the most recent prior study . The small left pleural effusion with associated atelectasis is stable . There is no focal consolidation concerning for pneumonia . The cardiomediastinal and hilar contours are stable , with stable appearance of the left pacemaker .
    OUTPUT:
    
Stable left apical pneumothorax .