Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an extensive ill - defined opacity in the right upper lobe , likely also involving the right middle lobe . No pleural effusion or pneumothorax is detected . Heart size is mildly enlarged and slightly increased in size compared to prior . No pulmonary edema is detected .
    OUTPUT:
    
Right upper , and possible middle , lobe pneumonia . Per ED discharge note , the patient is being treated for pneumonia .