Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is borderline enlarged . Mediastinal contours are unremarkable . Hilar contours are similar compared to the prior exam . Diffuse increased interstitial markings bilaterally suggest mild interstitial pulmonary edema . No pleural effusion or pneumothorax is identified . No acute osseous abnormality seen .
    OUTPUT:
    
Mild interstitial pulmonary edema .