Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided central venous catheter is noted with tip over the lower SVC . There is no pneumothorax . There is a moderate left - sided pleural effusion with some fluid tracking posteriorly and likely anteriorly . There is associated atelectasis . Elsewhere , lungs are clear . Mild cardiac enlargement is noted , new since ___ . Surgical clips project over the posterior mediastinum .
    OUTPUT:
    
Left - sided pleural effusion , partially loculated . Cardiomegaly new since ___ , potentially due to cardiac enlargement although pericardial effusion would be possible .