Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a persistent small left apical pneumothorax and unchanged multiple rib fractures . The cardiomediastinal silhouette is unchanged and the lungs are clear . There is no pleural effusion . A left pigtail catheter and epidural catheter are in place .
    OUTPUT:
    
A persistent small left apical pneumothorax is unchanged .