Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffusely increased interstitial markings may reflect interstitial pulmonary edema . Left - sided perihilar opacity is incompletely evaluate on this study , and may represent pneumonia , hilar lymphadenopathy , or a lung parenchymal lesion . Note is made of dense right lower lobe atelectasis . The heart is not enlarged . No pneumothorax .
    OUTPUT:
    
1 . Diffusely increased interstitial markings may reflect interstitial pulmonary edema . 2 . Left - sided perihilar opacity is incompletely evaluated on this study , and may represent pneumonia , hilar lymphadenopathy , or lung parenchyma lesion . CT of the chest with contrast could be performed for further evaluation . At the time of her proving this chest x-ray interpretation S CT at already been performed that demonstrated a left lung mass