Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the prior study , the patient just had thoracocentesis for right pleural effusion . There has been reaccumulation of the moderate - to - severe right pleural effusion with compressive atelectasis . The patient is known with right upper lobe lung malignancy with mediastinal and hilar lymphadenopathies that were better assessed in prior chest CT . The left lung is unremarkable . There is no pneumothorax . The mediastinal and cardiac contours are unchanged .
    OUTPUT:
    
The patient is known with lung malignancy with metastasis to lymph nodes . Since prior exam , there has been reaccumulation of moderate - to - severe right pleural effusion .