Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Mild cardiomegaly again noted . There is mild hilar congestion with interstitial pulmonary edema . No large effusion or pneumothorax . No overt signs of pneumonia though subtle pneumonia difficult to exclude in the correct clinical setting . Calcific densities overlie the left scapula as on prior . Degenerative changes at the right shoulder noted .
    OUTPUT:
    
Mild interstitial pulmonary edema . Difficult to exclude a superimposed subtle pneumonia .