Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As before the lungs are mildly hyperexpanded . Interstitial abnormalities at the right base are not appreciably changed . There is a new nodular opacity in the right mid lung measuring approximately 12 mm . Mild cardiomegaly is stable . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
12 mm nodular opacity in the right midlung may reflect an early pneumonia . Followup radiographs are recommended after treatment and CT of the chest if the finding does not resolve .