Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small effusion on the left , which may contain simple fluid or hemorrhage as indicated in the clinical history . Right lung is essentially clear . No pneumothorax . Heart size is mildly enlarged . There is a mildly displaced fracture of the left eighth rib .
    OUTPUT:
    
1 . Small left pleural effusion may represent simple fluid or hemothorax . 2 . Mildly displaced fracture of the left eighth rib . If further characterization is indicated , a dedicated rib series could be obtained if not recently performed .