Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Focal opacity at the left costophrenic angle is again seen , which may be due to atelectasis / scarring , a trace pleural effusion is not excluded . Slight increase in the interstitial markings bilaterally may be due to mild interstitial edema . The cardiac and mediastinal silhouettes are stable . There is no focal consolidation .
    OUTPUT:
    
Possible minimal interstitial edema . No large pleural effusion . Stable cardiac silhouette size .