Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen left pleural effusion appears smaller , but could represent pleural thickening . AICD with variant anatomy ( a left - sided IVC represent ) is demonstrated . Right - sided Hickman catheter rule is unchanged in location . No parenchymal nodule or consolidation is seen .
    OUTPUT:
    
Previously seen left pleural effusion is smaller .