Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is the very large left pleural effusion with only a small amount of aerated left upper lobe . Compared to the prior study the amount of fluid has slightly decreased however the pleural effusion is still large and there still mediastinal shift to the left indicating left lung collapse the right lung is relatively with a small amount of volume loss / early infiltrate in the right lower lobe medially . the appearance of the left chest tube is unchanged
    OUTPUT:
    
Decreased left effusion with continued left lower lobe collapse