Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . There is subtle increased opacity over the lower thoracic spine on the lateral radiograph . There is chronic pleural and parenchymal scarring at the left base . The cardiomediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . The retrosternal clear space is opacified reflecting known mediastinal fat . There is no pulmonary edema .
    OUTPUT:
    
Subtle increased opacity over the lower thoracic spine on the lateral radiograph may reflect early basilar pneumonia or aspiration . Short - term followup radiographs may be helpful in this regard