Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , no significant change in the known residual left basilar pleural effusion . The previously described left upper lobe consolidation is still present . The right lung is grossly clear . No evidence of pneumothorax . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
1 . Persistent left basilar effusion . 2 . Left upper lobe consolidation is persistent and has been described on multiple prior chest radiographs . Follow - up to resolution is recommended .