Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large right - sided pleural effusion increased in size since the prior study . The left lung is essentially clear although better assessed on the CT from the same day . Cardiomediastinal silhouette appears unremarkable .
    OUTPUT:
    
Right pleural effusion increased in size since the prior study , better assessed on the CT chest from the same day .