Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large right pleural effusion which appears to be partially loculated , with residual aeration of right upper lobe . There is a drain in place in the right lung base . The left lung is clear aside from mild atelectasis at the lung base . There is no pneumothorax . Cardiomediastinal silhouette is partially obscured by the right pleural effusion , but is unremarkable . Orthopedic fixation hardware seen in the right humeral head .
    OUTPUT:
    
Large loculated right pleural effusion with residual aeration of right upper lobe , with a pleural drain in place . No priors are available at this institution , though comparison with priors would be helpful to assess for interval change .