Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lung is clear . Post - surgical changes in the left lower hemithorax are essentially unchanged from the prior exam . Probable small left pleural effusion with adjacent atelectasis . No pneumothorax , pulmonary edema , or focal consolidation to suggest pneumonia . Stable cardiomediastinal silhouette , hila , and pleura . Incidental fifth left lateral rib fracture , present on the prior exam , age indeterminate .
    OUTPUT:
    
1 . No significant change from prior exam . 2 . Left lateral rib fracture , age indeterminate .