Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior again seen is a partially cavitary left upper lobe pulmonary nodule . Other known pulmonary nodules are not clearly identified . The lungs are clear of consolidation or effusion . The cardiac silhouette is enlarged but stable . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute cardiopulmonary process . Known cavitary left upper lobe nodule as previously characterized .