Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a large left pleural effusion similar to ___ with left lower lobe atelectasis given leftward mediastinal shift . Left upper lobe and right lung are clear . Limited evaluation of the cardiomediastinal silhouette due to overlying parenchymal abnormalities .
    OUTPUT:
    
Persistent large left pleural effusion with left lower lobe atelectasis .