Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . A persistent left apical pneumothorax is slightly increased in size without evidence of tension . Minimal bibasilar atelectasis is present as well as a small left pleural effusion . The cardiomediastinal silhouette and hilar contours are stable . Multiple minimally displaced left rib fractures are unchanged .
    OUTPUT:
    
1 . Persistent left apical pneumothorax without evidence of tension . 2 . Multiple left rib fractures .