Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Patchy ill - defined consolidative opacity in the left lung base , likely lingula , is concerning for pneumonia . Right lung is clear . No pleural effusion or pneumothorax is clearly seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Left basilar pneumonia . RECOMMENDATION ( S ) : Follow up radiographs after treatment are recommended to ensure resolution of this finding .