Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right pleural effusion unchanged since ___ and is likely moderate in size with a subpulmonic component . There is associated mild right basal atelectasis . There is a left upper lobe nodule measuring up to 3 .1 cm , better seen on prior CT chest . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . Patient is status post right mastectomy . Central catheter terminates at the cavoatrial junction .
    OUTPUT:
    
1 . Persistent right pleural effusion with mild right basal atelectasis . 2 . Left lung nodule , unchanged and better evaluated on the CT chest .