Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate right - sided pleural effusion is seen , larger when compared to prior and likely partially loculated laterally . Associated atelectasis is noted at the right lung base . The left lung is clear , there is no effusion . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Right - sided pleural effusion has increased in size and is likely partially loculated laterally .