Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . No prior . There is a moderate - sized right - sided pleural effusion with possible underlying atelectasis versus possible consolidation . There is some pleural thickening seen laterally at the left lung base without definite consolidation or evidence of pulmonary vascular redistribution . Cardiomediastinal silhouette is within normal limits . Surgical chain sutures seen at the left hilum compatible with history of left upper lobectomy . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
Moderate - sized right - sided pleural effusion and underlying atelectasis ; however , consolidation is not excluded . Postoperative changes of left upper lobectomy .