Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple left - sided ribs , spanning at least second through seventh levels are fractured in two places , with significant volume loss associated in the left chest . A pleural pigtail catheter is similar in appearance , with its pigtail not well formed . No pneumothorax can be appreciated . Left base atelectasis , and a small amount of linear atelectasis in the right lung is little changed . Small left effusion is unchanged . There is no new focal consolidation . The cardiac silhouette and mediastinal contours are unchanged .
    OUTPUT:
    
Traumatic deformity of the left thoracic cage , with associated left lung volume loss and small pleural effusion . No pneumothorax is appreciated on today 's study ; a pigtail catheter is in similar position .