Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pneumothorax has increased in size and is now small to moderate in size , with apical visceral line overlying the left fifth posterior rib level . Opacity at the left base has worsened compared to the recent chest x-ray and probably represents a combination of pulmonary contusion and atelectasis in the setting of recent chest wall trauma on the left with acute left - sided rib fractures which have been fully detailed on recent CT torso of earlier the same date . Small left pleural effusion is also present .
    OUTPUT:
    
Small to moderate left pneumothorax has increased since prior chest x-ray , but is similar in size since the more recent CT torso of earlier the same date when allowances are made for differences in patient positioning .