Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph again demonstrates left hemithoracic volume loss with superior retraction of the left hilum , related to prior left hilar mass resection . A left upper lobe nodule is similar in appearance . The cardiomediastinal silhouette is normal . There is no focal consolidation , pleural effusion , pneumothorax . Surgical clips noted in the right upper quadrant .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Unchanged appearance after left hilar mass resection . Similar appearance of a left upper lobe pulmonary nodule .