Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are normal . Lungs are hyperexpanded but grossly clear . New minimal blunting of left costophrenic sulcus may represent a small pleural effusion or focal pleural thickening . Scoliosis is noted .
    OUTPUT:
    
No evidence of pneumonia . New minimal blunting of left costophrenic sulcus may represent a small pleural effusion or focal pleural thickening .