Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Interval development of a large right pleural effusion with near complete collapse of the right lung . Shift of midline structures to the left is noted . The left chest wall Port - A - Cath tip likely resides within the SVC though is deviated to the left . Left retrocardiac opacity is again seen which likely reflect pneumonia / aspiration versus metastasis . No definite pneumothorax . Clips , CBD stent , projects over the upper abdomen .
    OUTPUT:
    
1 . Large right pleural effusion with near - complete collapse of the right lung and shift of midline structures to the left . Recommend thoracentesis . 2 . Retrocardiac opacity may represent pneumonia / aspiration versus metastasis .