Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Breast shadow projects over both lung bases . Despite this limitation , the lungs are clear . There is no nodule , consolidation , effusion , or pneumothorax . The heart and mediastinal contours are normal . The right posterior sulcus is blunted . Both costo-phrenic angles are sharp .
    OUTPUT:
    
Right posterior sulcus blunting could represent a tiny effusion or scaring .