Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Overall interstitial opacity is increased in the interval which raises concern for development of interstitial edema . Difficult to exclude a superimposed pneumonia though findings appear diffuse . No large effusion is seen . The overall cardiomediastinal silhouette is stable . No pneumothorax . Bony structures are intact .
    OUTPUT:
    
Worsening interstitial opacities likely reflect development of interstitial pulmonary edema . Difficult to exclude a subtle superimposed pneumonia .