Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is enlarged , similar to prior radiograph on ___ . There is a known left upper lobe nodule / mass is again seen . There is no focal consolidation , pleural effusion , or evidence of pneumothorax . The aorta is calcified and tortuous , unchanged .
    OUTPUT:
    
1 . No acute cardiopulmonary process . No pneumothorax . 2 . Stable left upper lobe nodule .