Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Midline sternotomy wires and mediastinal clips are again noted . Gas previously seen below the right hemidiaphragm is conspicuous and likely reflects the presence of a dialysis catheter . There is mild pulmonary interstitial edema with small left pleural effusion . Cardiomediastinal silhouette appears grossly stable . No pneumothorax . No acute osseous injury .
    OUTPUT:
    
Small left pleural effusion .