Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right pleural drainage catheter is noted at the lung base . There is a residual small right pleural effusion . There is background is mild interstitial pulmonary edema . The heart size is unchanged . The mediastinal contours are stable . There is no pneumothorax .
    OUTPUT:
    
1 . Right pleural drainage catheter seen at the lung base with residual small right pleural effusion . 2 . Mild interstitial edema .