Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are stable . Heart size is not well evaluated due to obscuring of the left heart border from adjacent atelectasis and left effusion although the heart size is probably normal . A moderate loculated left effusion is unchanged in size and appearance since ___ with associated left basilar atelectasis . Right lung is clear . There is no pneumothorax .
    OUTPUT:
    
Moderate loculated left pleural effusion unchanged since ___ .