Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared . Left apical pneumothorax is again seen and not significantly changed since previous exam . The lungs are otherwise clear . Cardiomediastinal silhouette is normal . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No significant interval change of left - sided pneumothorax .