Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small left apical pneumothorax has slightly decreased in size since the prior exam . There is no right pneumothorax . The lungs are clear without a consolidation , pulmonary edema or pleural effusion . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Slight interval decrease in the size of the small left apical pneumothorax .