Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs . The previously noted right base pneumothorax is no longer visible . Right basilar opacities are unchanged and mild pleural effusion has reaccumulated . The left lung is clear . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
Mild reaccumulation of right pleural effusion .