Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to large right pleural effusion with overlying atelectasis is seen , underlying consolidation not excluded . The left lung is grossly clear . No left pleural effusion is seen . There is no pneumothorax . Cardiac mediastinal silhouettes are grossly stable given partially obscured by the right sided opacity .
    OUTPUT:
    
Large right pleural effusion with overlying atelectasis , underlying consolidation not excluded .