Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the most recent radiograph performed 4 hours earlier , there has been interval enlargement of the right - sided pneumothorax . It currently measures up to 2 .4 cm from the thoracic cage , previously 1 .4 cm . No evidence of tension . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified .
    OUTPUT:
    
Enlarging right - sided pneumothorax , without evidence of tension .