Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size with a left ventricular configuration and a tortuous aorta . There is a focal opacity in the left retrocardiac region , which obscures the descending thoracic aortic interface . The lungs are hyperinflated . There is a mild dextroscoliosis and the bones appear generally demineralized . The pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Left lower lobe opacity which may represent focal / early pneumonia . Recommend followup chest radiographs in ___ weeks to ensure resolution and to exclude a lung nodule in this region .