Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . There is status post right upper lobectomy with corresponding elevation of the hilar structures and deformity of the pulmonary vascular pattern . There is no evidence of a new mass formation . Mediastinal structures with cardiac contours surrounded by scar formations unchanged , same holds for the detectable contours of the thoracic aorta . Left - sided pleural scar formations along the left lateral chest wall remain unaltered . Comparison with the next preceding examination demonstrates , however , that there again was some increase of pleural effusion with more prominent blunting with fluid of the lateral pleural sinus on the frontal view . Increased pleural density is also noted along the posterior right - sided lower chest wall coinciding with blunting of the posterior pleural sinus . There is no evidence of pneumothorax .
    OUTPUT:
    
Evidence of increasing pleural effusion on the right side . Considering the examination interval of six weeks , the progression of the right - sided pleural effusion is small to moderate . Findings of left - sided hemithorax are stable and unchanged .