Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral main stem bronchial stents are in position . Left perihilar and medial right apical masses appear similar . There is also unchanged left basilar opacification . There has in fact been little , if any , change since the prior radiographs aside from decreased volume loss at the left base and substantially decreased pleural effusions since the prior CT on the left .
    OUTPUT:
    
Decreased volume loss and left pleural effusion , otherwise unchanged .