Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP portable chest radiograph was obtained . There is a persistent crescentic opacity of collapsed right middle lobe . A hazy opacity has developed in the right pneumonectomy space . The left lung is clear . The heart and mediastinal contour are normal . Note is made of a prominent gastric bubble . Left - sided subcutaneous emphysema is unchanged .
    OUTPUT:
    
Increased hazy opacity in the right apical pneumonectomy space . Although this could represent blood or other fluid , there is not a large volume in this space .