Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show interval removal of the left apical pleural pigtail catheter from the preceding radiograph . The small left apical pneumothorax is unchanged in size or distribution . The inspiratory lung volumes are appropriate . The lungs are otherwise clear without focal consolidation or pleural effusion . The cardiomediastinal silhouette is within normal limits and unchanged .
    OUTPUT:
    
Stable small left apical pneumothorax , status post left pleural catheter removal .