Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a small left apical pneumothorax , similar in overall size with prior exam findings . No significant atelectasis or signs of tension . No evidence of pneumonia , edema , or effusion . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Small left apical pneumothorax .