Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest again demonstrate stable mild cardiomegaly . A tortuous aorta is noted . Fullness of the hila bilaterally is again seen and consistent with the patient 's history of Castleman 's disease . Subtle opacities are noted at the right and left lung bases , which may be atelectasis . No focal consolidation is identified .
    OUTPUT:
    
Unchanged bibasilar opacities which may represent atelectasis or pneumonia . There is no significant change from the prior radiograph from ___ .