Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Slight prominence of the interstitial markings bilaterally suggests mild interstitial edema . There is left mid lung linear atelectasis / scarring . Additionally , there is left base patchy opacity in the left base somewhat triangular opacity which has been present on multiple priors dating back to ___ , which may represent scarring . No definite new consolidation is seen , although a small left base consolidation will be difficult to exclude . No large pleural effusion is seen . There is no pneumothorax . The cardiac and mediastinal silhouettes are grossly stable given differences in inspiration technique , the cardiac silhouette may be slightly more enlarged than on the current study .
    OUTPUT:
    
Mild interstitial edema . Left mid lung atelectasis / scarring and chronic scarring to left lung base with possibly mildly enlarged cardiac silhouette .