Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates interval worsening of pulmonary edema since the prior study eight hours earlier . The left mid lung opacity is unchanged acutely and could be atelectasis or scarring , but appears to have grown over the past several months , and could therefore be a mass . There is no pneumothorax or large pleural effusion . Marked cardiomegaly is unchanged . A face mask rests over the tracheostomy .
    OUTPUT:
    
Interval worsening of pulmonary interstitial edema . Left mid lung opacity and marked cardiomegaly unchanged . The above findings were communicated to Dr . ___ by Dr . ___ ___ telephone at 10 :00 , at the time the discovery was made .