Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidations or pulmonary edema . There is no pleural effusion or pneumothorax . In the left mid lung zone , there is a 5 mm calcified nodule , which is likely from prior granulomatous disease . Alternatively , this may be a small bone island in the third left rib . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Small left upper lobe sclerotic / calcific nodular opacity is likely an old calcified granuloma or a small third rib bone island .