Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest ___ at 18 :39 is submitted .
    OUTPUT:
    
A moderate - sized layering right effusion may have somewhat decreased in size . Associated right lower lobe atelectasis is stable . Remaining lungs are clear without evidence of pulmonary edema or pneumothorax . Overall cardiac and mediastinal contours are likely stable , although the right heart border is obscured .