Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is diffuse reticular interstitial changes suspicious of underlying interstitial lung disease . Superimposed pulmonary edema is unchanged since ___ . Considering the extensive underlying pulmonary disease , it is difficult exclude pneumonia . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
1 . Diffuse reticular interstitial changes suspicious of underlying interstitial lung disease . If clinically indicated , further evaluation with CT is recommended . 2 . Pulmonary edema is unchanged . Pneumonia is difficult to exclude given the underlying pulmonary disease .