Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: NG tube end at 3 cm from the carina , left subclavian PICC has tip ending at cavoatrial junction , unchanged since ___ . Left pleural drain has been removed . Right lung is well inflated and largely clear except for patchy opacities in the right costophrenic angle , probably due to atelectasis . Left lung base is opacified by stable pleural effusion . Heart size is mildly enlarged . There is no pulmonary edema or vascular congestion .
    OUTPUT:
    
Left pleural drain has been removed . Persistent left lung base small pleural effusion . The exam is otherwise unchanged since ___ .