Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate left pleural effusion with an air - fluid level suggesting a small collection of pleural air overlying the fluid . There is left apical scarring which is stable since ___ . The post-operative cardiomediastinal widening is unchanged . The right lung is clear . The sternal cerclage wires are intact . A right PICC sits within the right atrium approximately 4 cm beyond the estimated location of the superior cavoatrial junction . There is no pneumothorax .
    OUTPUT:
    
1 . Tiny right and moderate left pleural effusions with small left pleural air collection , likely post-operative . 2 . Improperly positioned right PICC with the tip in the right atrium approximately 4 cm beyond the cavoatrial junction .