Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small bilateral opacities in the lower lungs are increased compared to the prior exam . On the left side , it is partly due to atelectasis , but on the right side , a superimposed infection can not be excluded . There is a small pleural effusion if any . There is no pneumothorax . Important cardiomegaly is stable . The mediastinal contour is normal .
    OUTPUT:
    
Proble progression of pneumonia .