Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Allowing for low lung volumes , heart is upper limits of normal in size . Aorta is mildly tortuous , and pulmonary vascularity is normal . Prominence of right superior mediastinal contour appears to correspond to tortuous brachiocephalic vessels on recent CT . Additionally , thyroid enlargement may contribute to this appearance in the upper paratracheal region . Small right pleural effusion is apparently new from the prior study , and is accompanied by adjacent right basilar lung opacity . Bones are demineralized , and slight decrease in height is seen in multiple vertebral bodies .
    OUTPUT:
    
Small right pleural effusion and adjacent atelectasis or consolidation .