Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . Hila and cardiomediastinal contours are normal . There is no pleural effusion or pneumothorax . A well - circumscribed 12 mm oval density overlying the left posterior 7th rib is unchanged from radiograph in ___ . Surgical clips overlie the right upper quadrant consistent with prior cholecystectomy .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Left mid lung density unchanged from ___ . If clinical concern for malignancy , a CT could be obtained for further evaluation .