Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and pulmonary vasculature are unremarkable and similar to the prior examination . There is no pleural effusion or pneumothorax . There is stable thickening of the lower lateral left pleura . The lungs are clear .
    OUTPUT:
    
No acute intrathoracic abnormality .