Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP supine chest radiograph obtained . The heart is mildly enlarged . There is left retrocardiac opacity , which could represent atelectasis or pneumonia . There may be tiny bilateral pleural effusions . Mediastinal contour is stable with atherosclerotic calcifications noted . There are coarse calcifications in the right lateral breast . Bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly with retrocardiac opacity , question atelectasis or pneumonia . Probable tiny pleural effusions also noted .