Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Lungs are clear . There are bilateral pleural effusions , which have improved in comparison to the prior chest radiograph . There is an area of linear focal scarring seen at the left lung base . No pneumothorax is seen . There is an expansile lesion of the left ___ posterolateral rib , which appears more expansile is in comparison to the prior chest radiograph .
    OUTPUT:
    
1 . Improving bilateral pleural effusions . 2 . Expansile lesion of the left ___ posterolateral rib , which in the setting of metastatic prostate cancer likely represents a healed pathologic rib fracture .